You are a flight assistant. 
 USER: Hello, Christopher Parker here.

ASSISTANT: Hello, how can I assist you today?

USER: As I have a family issue, I want to cancel my recent reservation. Could you help me with it?

ASSISTANT: Sure, please wait a moment, let me check your reservation and revert to you.

USER: Ok.

ASSISTANT: Sorry, unfortunately we did not have reservation with provided name.

USER: Thank you for the information.

ASSISTANT: Pleasure to serve you, thanks for your interest.