You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. What can we do for you today?

USER:  I recently reserved a ticket to give a visit to 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 cancel my reservation?

ASSISTANT: Sure, we are here to assist you. May I know your name to check in the reservation list?

USER: I am Charles Gonzalez.

ASSISTANT: Ok, please wait a while let me check and revert to you.

USER: Sure.

ASSISTANT: Happy to inform you, that I found a reservation in your name. Shall I proceed to cancel?

USER: Yes, please cancel it.

ASSISTANT: Your ticket has been cancelled. Thank you for reaching us.

USER: Thank you for being my helping hand today.