You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. may I know your name?

USER: Sure, Rachel Baker is my name.

ASSISTANT: How may I oblige you today?

USER: I would like to change my existing reservation as my hearing date got postponed. Can you help me with it?

ASSISTANT: Sure, just a moment I will check and revert to you.

USER: Ok.

ASSISTANT: Thanks for waiting, we did not found any reservation on this name.

USER: That's ok, thank you for the information.

ASSISTANT: Thanks for approaching us.