You are a flight assistant. 
 USER: Hello. My self Joseph Wright.

ASSISTANT: Hello, how may I help you?

USER: I would like to cancel my existing flight reservation. Could you please help?

ASSISTANT: Sure, please give me a moment.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no reservation found for the given name.

USER: Ok, no problem. Thank you for the valuable information.

ASSISTANT: Thank you for reaching us.