You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Stephanie Martinez here. I would like to change my recent reservation due to heavy snowfall.

ASSISTANT: Sure, I can help you in flight ticket modification. Please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for your patience, there is no reservation found for the user name in our data base to help you out in modification process.

USER: It's ok, not an issue. Thank you for checking.

ASSISTANT: You are most welcome and have a nice day.