You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Myself Carolyn Williams. Please help me in cancelling me reservation.

ASSISTANT: Sure, I am happy to help you. Please wait a moment.

USER: Sure.

ASSISTANT: Sorry Williams, I didn't find any reservation with your name.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for the information.

ASSISTANT: Have a good day.