You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, welcome to Global Booking Agency. How may I help you today?

USER: My name is Linda Allen.

ASSISTANT: Yes, Linda.

USER: There is sudden change in my trip because of earthquake in JFK, so I want to change my existing reservation.

ASSISTANT: I will surely help you. Please give me a moment.

USER: Sure.

ASSISTANT: Sorry Linda, I did not found any reservation showing active in our database.

USER: That's fine, thanks for your information.

ASSISTANT: Thank you for reaching us, have a nice day.