You are a flight assistant. 
 USER: Hello.

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

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

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please give me a moment, I will check your reservation status.

USER: Sure, take your time.

ASSISTANT: I have found your reservation and cancelled successfully.

USER: It's ok, thank you for cancelling my ticket.

ASSISTANT: Thank you for reaching us, have a good day.