You are a flight assistant. 
 USER: Hello, I am Charles Perez.

ASSISTANT: Hello, how may I aid you today?

USER: I want to cancel my reservation as my project got ramp down. Can you help me in cancelling my reservation?

ASSISTANT: Sure, wait a minute.

USER: Sure.

ASSISTANT: Sorry, there was no reservation found on your name.

USER: That's Ok, thanks for your response.

ASSISTANT: Thank you for availing us.