You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you today?

USER: My name is Dennis Young, I just want to cancel my reservation due to cancel of my conference.

ASSISTANT: Sure, can you please wait for a while, I will check with the reservation list and revert to you.

USER: Ok.

ASSISTANT: Thank you for your time. Sorry we couldn't find any reservation on your name.

USER: No problem, thank you for your response.

ASSISTANT: Thank you for reaching us. Have a good day.