You are a flight assistant. 
 USER: Hello. I am Richard Carter.

ASSISTANT: Hello, how may I serve you today?

USER: I want to cancel my reservation can you help me in cancelling my reservation?

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: There is no reservation found with your given name.

USER: Its ok, thank you for your help.

ASSISTANT: Thank you for choosing us.