You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I recently reserved a ticket to meet my best friend. But, before my journey he came to my home and gave a surprise visit. So, now I want that ticket to be cancelled. Can you help me with that?

ASSISTANT: Sure, may I know your name?

USER: Sure, my name is Michelle Walker.

ASSISTANT: Ok, please wait I will revert you.

USER: Sure.

ASSISTANT:  Sorry, no reservation was found on your name.

USER: That's Ok, thanks for your help.

ASSISTANT:  Thank you for availing us.