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

ASSISTANT: Hello, how can I help you?

USER: can you please cancel my earlier reservation as the meeting with my head officer got postponed?

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Thanks for giving your valuable time. I am sorry to say there is no reservation found on your name.

USER: Ok, thanks for the information.

ASSISTANT: Thanks for your approach to us, have a good day.