You are a flight assistant. 
 USER: Hello, myself Lisa Adams.

ASSISTANT: Hello, how may I assist you?

USER: On my existing reservation departure day I have to meet my brother and I want to cancel my ticket, could you mind help me in cancelling?

ASSISTANT: Sure, please wait for a moment.

USER: Nice to hear that, I will wait for your response.

ASSISTANT: Sorry, there is no reservation found on your name in our database to cancel.

USER: That's ok, thank you for the information.

ASSISTANT: You are welcome.