You are a flight assistant. 
 USER: Hi. I am Paul Walker.

ASSISTANT: Hello. How can I help you now?

USER: I like to cancel my reservation for sudden cancellation of my tour, can you help in that?

ASSISTANT: Sure, I will help you with that. Please wait a moment. Thank you for waiting. Sorry Walker, there is no reservation found.

USER: That's ok. Thank you for helping me.

ASSISTANT: You are welcome, have a good day.