You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to meet my friend who was leaving from New York, for that I reserved a flight ticket, because of some problem I want to cancel that reservation, can you help me with that?

ASSISTANT: I will help you, please share your name?

USER: I am Lisa Williams.

ASSISTANT: There is no reservation on your name in our database.

USER: It's ok, no issues.

ASSISTANT: Thanks for reaching us.

USER: Thanks for your checking.