You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help 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 with this.

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your good name please?

USER: My name is Nicholas Parker.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry Parker, there is no reservation available as per your name in our database.

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

ASSISTANT: Thank you for reaching us with a query.