You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, How may I serve you?

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 please help me?

ASSISTANT: Sure. To cancel your reservation I need your name.

USER: I am Donna Martinez.

ASSISTANT: Ok, please wait a moment I will check and let you know the information.

USER: Sure.

ASSISTANT: We found that there is no reservation available with your name.

USER: Ok, no problem. Thanks for the information.

ASSISTANT: Thank you for reaching us.