You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: My name is Brian Walker, I want to cancel my ticket due to a change in my plan. Can you help with that?

ASSISTANT: Sure, I will help with the flight ticket cancellation.

USER: Thank you.

ASSISTANT: Thanks for waiting. But I am sorry to say that, there is no reservation on your name.

USER: That's ok, thank your help.

ASSISTANT: Thanks for approaching us.