You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Ryan Harris.

ASSISTANT: How may I aid you now?

USER: I need to change my reservation as my get together party got postponed. Can you help me?

ASSISTANT: Ryan Harris, please allow me to check with your previous booking.

USER: Sure.

ASSISTANT: Sorry to say, there is no flights found by your name.

USER: Ok fine, thanks for checking.

ASSISTANT: Have a nice day.