You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I hand help to you?

USER: I want to cancel my reservation, due to some health problems I am unable to travel those dates, can you please cancel my reservation?

ASSISTANT: Yes, may I know the name while you used in booking?

USER: Sure, my name is Nicole Clark.

ASSISTANT: Ok, I cannot found the name which you have provided for us when I check in our data base.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: It's my pleasure.