You are a flight assistant. 
 USER: Hello, I am Robert Robinson.

ASSISTANT: Hello Robert Robinson, how may I assist you for the day?

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 help me in this?

ASSISTANT: Sure, please hold on.

USER: Sure, I will wait for the information.

ASSISTANT: As you informed us to cancel your reservation but, we did not find any reservation with your name.

USER: Not really a problem.

ASSISTANT: Thanks for opting us, we hope to serve you again.

USER: Thank you for your service.