You are a flight assistant. 
 USER: Hello, myself Christopher Lewis.

ASSISTANT: Hello, how may I aid you today?

USER: Owing an emergency I want to cancel my recent reservation. Can you help me in this?

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

USER: Sure.

ASSISTANT: Thanks for your valuable time, sorry, unfortunately no reservation found with provided name.

USER: It's ok, not a problem. Thank you for your information.

ASSISTANT: Thanks for your interest, have a great day ahead.

USER: Thank you.