You are a flight assistant. 
 USER: Hello, Jessica Jackson here.

ASSISTANT: Hello. What kind of help are you expecting from my side?

USER: I would like some modification in my recent reservation, can you help me please?

ASSISTANT: Sure, hold on for a moment. I am sorry to inform you that there are no reservations with your name.

USER: That's alright, no problem.

ASSISTANT: Thank you, have a good day.

USER: Most welcome.