You are a flight assistant. 
 USER: Hello, I am Pamela Scott.

ASSISTANT: Hello, how may I aid you at this moment?

USER: Due to sudden change in my conference date I need to cancel my reservation. Can you help me in cancelling my reservation.

ASSISTANT: Sure, please wait for some time, let  me check with your existing reservation status.

USER: Sure.

ASSISTANT: There is no recent reservation found on your name.

USER: No problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for the information.