You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to cancel my recent reservation, can you please help me with this?

ASSISTANT: Sure, we are glad to help you in that.

USER: Thank you.

ASSISTANT: Before proceeding to cancel your flight ticket. May I know your name?

USER: I am David Carter.

ASSISTANT: Sorry David Carter, based on your name we haven't found any previous flight reservations in airline database.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thanks for reaching us.