You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I would like to cancel my recent reservation due to postpone of my conference. Can you please help me?

ASSISTANT: Sure, I am here to assist you. Please mention your name.

USER: I am Dennis Mitchell.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, we did not find any reservation on your name.

USER: No worries, thank you for the information.

ASSISTANT: Thank you for availing us.