You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I have already reserved my ticket, but right now I want to cancel that reservation. Can you help me with this?

ASSISTANT: Sure. May I know your name please?

USER: I am Joseph Phillips.

ASSISTANT: Sorry, no reservation is found as per your details.

USER: It's ok, no issues. Thanks for your help.

ASSISTANT: Thank you for reaching us.