You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Dorothy Thompson.

ASSISTANT: How can I aid you?

USER: Can you please cancel my reservation, due to cancel of my trip with colleagues?

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name in our reservation list.

USER: Ok, no issue. Thank you.

ASSISTANT: Thank you for choosing us, have a nice day.