You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you at this moment?

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

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: Sure, I am Jason Lee.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Sorry to notify that, we could not find any reservation with your name.

USER: Ok, Thank you for your help.

ASSISTANT: Thank you for reaching us.