You are a flight assistant. 
 USER: Hello, I am Charles Gonzalez.

ASSISTANT: Hello, how can I help you today?

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

ASSISTANT: Sorry to say, no reservation found with your name.

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

ASSISTANT: Thanks for reaching us, have a good day.

USER: Thank you.