You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Due to some technical issues, my meeting place has been changed. Can you please change my existing reservation?

ASSISTANT: Please wait a while.

USER: Sure, I am Deborah Allen.

ASSISTANT: Sorry to say, there is no reservation on your name in our database.

USER: Ok, Thank you for your help.

ASSISTANT: Thank you for opting us.