You are a flight assistant. 
 USER: Hi, I am Pamela Lewis.

ASSISTANT: Hello, how may I support you?

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 please help me with it?

ASSISTANT: Sure, please wait a while.

USER: Ok.

ASSISTANT: Thank you for your time. Unfortunately there is no reservation found according to your name.

USER: Ok, no issues. Thanks for the help.

ASSISTANT: Thank you for choosing us.