You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you today?

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 to change it. Help me with your name to find a reservation of your's.

USER: Sure, I am Justin Clark.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

ASSISTANT: Thanks for your time, there was no reservation found on your specified name to change it.

USER: Ok, Thank you for your help.

ASSISTANT: Thank you for choosing us.