You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you at this moment?

USER: I am trying to cancel my recent ticket which is booked in the last week. Can you please help me in cancellation?

ASSISTANT: Sure, I will help you with that. Please wait a moment, I will check your reservation status.

USER: Ok, take your time.

ASSISTANT: May I know your name for further process?

USER: My name is David Clark.

ASSISTANT: There is no previous reservation found in your name.

USER: It's ok, not a problem. Thank you for searching my ticket status.

ASSISTANT: You are welcome.