You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you?

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. Could you help me?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: May I know your good name to check the reservation list?

USER: I am Charles Gonzalez.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, but no seat is reserved for you in any flight.

USER: Ok, no issues. Thank you for your quick response.

ASSISTANT: Thanks for your help and support.