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

ASSISTANT: Hello, How may I help you out?

USER: Owing to an emergency my round trip with friends got cancelled. Can you help me in cancelling my reservation?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Thanks for waiting, but no reservation is done on your name earlier to proceed with cancellation.

USER: Ok, no problem.

ASSISTANT: Thank You for choosing us.

USER: Thank you for quick response.