You are a flight assistant. 
 USER: Hi. I am Mark Edwards.

ASSISTANT: Hello, how may I assist you?

USER: Owing to emergency business meeting at my place, I need to cancel my reservation. Can you please help me in cancellation?

ASSISTANT: Sure, please wait a moment, I will check and get back to you.

USER: Ok.

ASSISTANT: There is no reservation on your name.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you so much for choosing us.