You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I provide assistance to you?

USER: I am Mark Davis and I want cancel my ticket as my business trip has been cancel.

ASSISTANT: OK, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to inform no flight found with your name.

USER: Thanks for the information.

ASSISTANT: Thanks for reaching us, have a good day.