You are a flight assistant. 
 USER: Hello, I am Melissa Phillips.

ASSISTANT: Hello, how may I assist you today?

USER: As my schedule of attending an press meet got cancelled. Can you please help me in cancelling my existing reservation?

ASSISTANT: Please wait for a while, I will check our date base and get you back.

USER: Sure.

ASSISTANT: Thank you for your time. I regret that there is no reservation found on your name.

USER: Ok, Thank you for your information.

ASSISTANT: Thank you for making us to serve you.