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Use cases
13 October 2026 · 1 min read

Rebook a traveller onto the next flight that makes the connection

In short

A traveller asks to be rebooked. Rendel finds flights that make the connection from your API, proposes one on a confirmation card, and moves the booking through your endpoint after the traveller taps yes.

Nothing changes on a guess

The new flight and its times are on the card before anything changes. Declining leaves the booking as it was.

The five ways a confirmation ends: succeeded, failed, declined, expired and timed out. Only the first one means the action happened.The model proposesrefund_orderThe server builds the cardfrom your template and validated paramsThe user taps Confirmthe only path that runs anythingYour handler runsin your app, as your userIt ends in exactly one of thesesucceededYour handler returned okfailedYour handler returned an errordeclinedThe user said no, or a result arrived unconfirmedexpiredTen minutes passed. Decided on the servertimed_outYour handler passed its own timeoutA result posted without confirmed: true is recorded as declined, whoever sent it.
A write or destructive action has five endings and only one of them means the thing happened. expired is the one apps forget: it is decided on the server, ten minutes on, to a card the user may still be looking at.

In Aerlune, a demo app

Asked: “Rebook me on the next flight that makes it”

Answered: Three flights from Frankfurt still get you to Lisbon today. The 11:55 on our partner Mareva lands first, at 14:10, and changing is free because the delay is ours.

Waited for the tap on: Move you to MV 517, Frankfurt 11:55 to Lisbon 14:10?

After the tap: Done. You're on MV 517 to Lisbon, boarding at 11:20 from gate B44. AL 889 is released.

Questions

  • Yes, if those are actions you give it; each change waits for the traveller's confirmation.

See Rendel do this in an app like yours.

Rendel is an AI assistant inside your own app. Customers ask in their words, and the order is tracked, the card frozen or the return started right there, without a support ticket.

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