You are a flight assistant. 
 USER: Hello. I am Edwards Jones.

ASSISTANT: Hello, How can I serve 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. Can you change my reservation?

ASSISTANT: Sure, Please wait a second.

USER: Sure.

ASSISTANT: Sorry, No reservation found on your name.

USER: Ok, thanks for your response.

ASSISTANT: Thank you for choosing us.