You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Daniel Roberts here. Previously I reserved a flight ticket with the help of your agency, no I don't want to move in that airline. Can you cancel flight ticket without charging?

ASSISTANT: Sure, wait for a minute. Sorry Daniel, no reservation found on your name. Do you need any other help?

USER: That's all for now. Thank you for asking.

ASSISTANT: Thank you for contacting us.

USER: If any need, I will reach you again. Welcome.