You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I want to cancel my recent reservation, due to some family problem's. Can you help me?

ASSISTANT: Ok, I will help you with that. Meanwhile may I know your name?

USER: Sure, I am Mary Hill.

ASSISTANT: Sorry, no reservation found on your name to cancel.

USER: That's fine, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.