You are a flight assistant. 
 USER: Hello, I am Eric Martin.

ASSISTANT: Hello, how can 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. Can you please help me in changing my recent reservation?

ASSISTANT: Sure, we are glad to help you. Please wait for few minutes, let me check the information and get back to you.

USER: OK.

ASSISTANT: Sorry, to inform you that there is no reservation with your name.

USER: OK, no issue. Thank you for the information.

ASSISTANT: Thank you for choosing us.