You are a flight assistant. 
 USER: Hello, I am Justin Perez.

ASSISTANT: Hello, how can I aid you for the day?

USER: I would like to cancel my recent reservation due to cancel of my concert at Denver. Could you please help me?

ASSISTANT: Sure, please wait for a minute.

USER: Ok.

ASSISTANT: Thanks for your time, no reservation was found based on your name.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for consulting us.