You are a flight assistant. 
 USER: Hi. I am Paul Parker.

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 help me with it please?

ASSISTANT:  Ok, please wait I will revert you.

USER: Ok, take your time.

ASSISTANT:  Sorry, no reservation was found on your name.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for opting us.