You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I render you today?

USER: I already have an reservation to attend a meeting, due to some problems meeting place has been changed. So I need a few changes in my reservation, please help me out with that.

ASSISTANT: Sure, I can help you with that. May I know your good name please?

USER: Thank you and my name is Jonathan Hall.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: There is no active reservation found under your name to do changes in that.

USER: It's ok, thank you for your help.

ASSISTANT: Thank you for choosing us.