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

ASSISTANT: Hello, how may I help you?

USER: I need to cancel my reservation, can you help me out?

ASSISTANT: Sure, please wait for a moment to check your details.

USER: Sure, take your own time.

ASSISTANT: Sorry to say, no reservation found on your name in my database.

USER: That's ok, not an issue. Thank you for your information.

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