You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My name is Timothy Scott. Due to a sudden meeting, the friend's trip is cancelled. Could you help me in cancelling the ticket?

ASSISTANT: Ok, please give me a second. Sorry, there is no previous reservation on your name.

USER: That's ok.

ASSISTANT: Thank you, have a good day.