You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. What kind of help are you looking for?

USER: Will you please change my existing reservation? Because I need to shift my things other place.

ASSISTANT: Sure, I can help you in that.

USER: Thank you.

ASSISTANT: Can you mention your name, to proceed further?

USER: I am Gary Hernandez.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT:  Sorry Gary, there is no active reservation on your name to change it.

USER: Ok, Thank you.

ASSISTANT:  Thanks for choosing us.