You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Jeffrey Johnson on this end.

ASSISTANT: How can I help you?

USER: I would like to cancel my reservation, as my cousin's marriage is postponed. Can you help me?

ASSISTANT: Sure, please be on hold. There is no reservation found under your name to do cancellation.

USER: Ok, that's fine. Thank you for checking.

ASSISTANT: Thank you for choosing us.

USER: You are most welcome.