You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I asses you in this time?

USER: I am Lisa Hill. I want to cancel my reservation, due to heavy snowfall in New York.

ASSISTANT: Sure, I am here in helping for you. Please give me some time to find your recent booking in our data base.

USER: It's ok, thank you for information.

ASSISTANT: Thank you for your time in waiting. I am unable to find your recent booking which you have done in your previous time. I think your ticket booking is not placed while you are booking.

USER: That's ok, thank you for your inforamtion.

ASSISTANT: It's my pleasure.