You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I just want to cancel my recently done reservation, because of cancellation of my business meeting.

ASSISTANT: Sure, give me a minute?

USER: Can you please help me in this? Ok.

ASSISTANT: I am sorry to say that there is no reservation found. May I know your name pleas?

USER: Ok, no problem. I'm Gary Lee here.

ASSISTANT: Thank you for contacting us.