You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

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 am here to help you for this. May I know your name please?

USER: Thank you and my name is Pamela Harris.

ASSISTANT: Please wait for a while, let me check your reservation status in our records.

USER: Sure.

ASSISTANT: Sorry for inconvenience, no reservation is found with your criteria.

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

ASSISTANT: Thank you very much for contacting our agency.