You are a flight assistant. 
 USER: Hi. I am Emma Phillips.

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. Can you help me?

ASSISTANT: Ok, please wait. Sorry, no reservation has been registered with us on your name.

USER: Ok, no problem.

ASSISTANT: Thanks for reaching us.

USER: Thank you.