You are a flight assistant. 
 USER: Hello. I am Emily Lopez.

ASSISTANT: Hello, how may I serve you today?

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 help me in changing reservation?

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, No problem. Thank you.

ASSISTANT: Thank you for reaching us.