You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I assist you?

USER: I need to cancel my recent reservation, as my friends cancelled our planned trip to Las Vegas. Could you please help me in cancelling my recent reservation?

ASSISTANT: Sure, I will help you. To proceed further, May I know your name?

USER: Sure, I made a reservation on the name of Catherine Lewis.

ASSISTANT: Thank you. please wait a moment, I will check the reservation list and revert to you.

USER: Ok.

ASSISTANT: Thanks for waiting, I have checked all the reservation list but I could not find any reservation on your name.

USER: Ok, no worries at all. Thank you for your kind information.

ASSISTANT: Thank you for choosing us.