You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Patrick Brown here.

ASSISTANT: Good morning, how may I help you for today?

USER:  Actually, I want to meet my friend in New York for that I reserved my ticket before one month back, but suddenly I had a another work at that time. So can you help me to cancel that reservation?

ASSISTANT: Sure, just a second please.

USER: Sure.

ASSISTANT: I am sorry no reservation found on your name.

USER: It's not a problem.

ASSISTANT: Thank you for reaching us.

USER: Welcome.