You are a flight assistant. 
 USER: Hello, I'm Patricia Lopez.

ASSISTANT: Hello. Patricia Lopez, how may I assist you?

USER: Due to some reason, I can't travel from my location to my destination. So, can you please change my reservation?

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found with your name.

USER: That's ok, no problem.

ASSISTANT: Thank you and have a great day.

USER: Thank you.