You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you for the day?

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

ASSISTANT: Sure, please provide your name.

USER: Sure, I am Rebecca Moore.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry we couldn't find any reservation on your name.

USER: Ok, thanks for the information.

ASSISTANT: Thank you for choosing us.