You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I already have an reservation to attend at my meeting, due to some problems meeting place has been changed. So I need a few changes in my reservation. Can you aid me with that?

ASSISTANT: Sure, may I know your good name please?

USER: My name is Debra Carter.

ASSISTANT: Please wait for some time.

USER: Sure.

ASSISTANT: There is no existing reservation found on your name. Thank you for opting us.

USER: That's Ok thanks for your information.