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

ASSISTANT: Hello, how can I help you?

USER: My trip got cancelled, due to business meeting.

ASSISTANT: Ok.

USER: Can you help me to cancel my reservation?

ASSISTANT: Sure, I will help you. Please wait for a while.

USER: Ok.

ASSISTANT: Sorry to tell that there is no reservation on your name.

USER: That's fine.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your support.