You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I guide you for today?

USER: Jerry Brown here. Actually I made a earlier reservation to go for a trip with my friends, but heavy work load in office I want to change my reservation.

ASSISTANT: Sure, I will help you with that Jerry Brown.

USER: Ok.

ASSISTANT: Sorry to say this Jerry Brown, there is no active reservation with your name to change the reservation.

USER: That's ok, no issues. Thank you.

ASSISTANT: You are welcome, thank you for reaching us.