You are a flight assistant. 
 USER: Hello, I am Robert Thomas.

ASSISTANT: Hello. What can I do for you Robert Thomas?

USER: As my friend's marriage is postponed, Can you please cancel my reservation?

ASSISTANT: Sure, wait for a while.

USER: Ok.

ASSISTANT: Thanks for your time. You have no reservation with your name.

USER: Ok. Thank you.

ASSISTANT: Thank you for reaching us.