You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,. What can I do for you now?

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 with that?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: To cancel your ticket, we need your name. Can you provide it?

USER: I am Shirley Lewis.

ASSISTANT: Thanks for the details, please wait.

USER: Sure, take your time.

ASSISTANT: Sorry Lewis, no active reservation found on your name to cancel it.

USER: Ok, I think something went wrong at the time of booking. Thanks for your prompt response.

ASSISTANT: Ok, Thanks for your presence.