You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: My name is Mark Allen. As my business trip got cancelled, I would like to cancel my reservation.

ASSISTANT: Sure, I will help you with this.

USER: Ok.

ASSISTANT: Mark Allen, there is no active reservation found under your name in our database.

USER: That's fine.

ASSISTANT: Thank you for contacting us.

USER: Thank you for your time.