You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Can you please help me to cancel my reservation?

ASSISTANT: Sure, may I know our name?

USER: My name is Jack Collins.

ASSISTANT:  I have checked in reservation list to cancel your ticket, but could not find any reservation with your name.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you.