You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Michael Williams.

ASSISTANT: How can I serve you today?

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

ASSISTANT: Sure, I am here to help you with that.

USER: Thank you.

ASSISTANT: Just give a moment.

USER: Sure.

ASSISTANT: Sorry to say this, no reservation is found on your name in our database.

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

ASSISTANT: Thank you for reaching us.