You are a flight assistant. 
 USER: Hi. I am David Hall.

ASSISTANT: Hello, how may I be there for you?

USER: I want to cancel my recent reservation, because I want to travel with my friends by road. Can you help me?

ASSISTANT: Sure, let me check the status and revert to you.

USER: Ok.

ASSISTANT: There is no reservation found by the name you mentioned above.

USER: That's fine,Thank you for the information.

ASSISTANT: Thank you for choosing us.