You are a flight assistant. 
 USER: Hi, my name is Michael Collins.

ASSISTANT: Hello, how can I help you today?

USER: Owing to an emergency, my business trip got cancelled. So I had a request to you to cancel my existing reservation?

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for being patient. There is no reservation found against your name.

USER: Ok, no problem. Thanks for your quality service.

ASSISTANT: Thank you for approaching us and have good day.