You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I assist you?

USER: Owing an emergence, I want to cancel my recent reservation. Please help me with it?

ASSISTANT: Sure, we are here to help you. May I know your good name?

USER: My name is Mary Jones.

ASSISTANT: No reservation found with your name.

USER: That's ok.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Thanks for the help.