You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: Due to some entrepreneurship meeting, I am going to change my existing reservation. Can you please help me in changing the reservation?

ASSISTANT: Sure. I am gleeful to help you with that. Can you please share your name?

USER: I am Jessica Hill.

ASSISTANT: Thank you for waiting. Jessica Hill, there is no active reservation found under your name to do changes in that.

USER: No problem, thank you for the information.

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