You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: My name is Timothy Lee, I want to cancel my reservation as my plan to meet my friend is cancelled. Can you cancel my reservation?

ASSISTANT: We are here to help you. Sorry, no active reservation was found on your name in our data base.

USER: Ok, thank you for the information.

ASSISTANT: Welcome, thank you for reaching us.