You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: Can you please change my existing reservation? Because I need to change my food court to other place.

ASSISTANT: Ok, please wait I will revert you.

USER: Ok.

ASSISTANT:  But to proceed further may I know your name?

USER: I am Anna King.

ASSISTANT:  OK, please wait.

USER: Sure.

ASSISTANT:  Sorry, no reservation was found on your name.

USER: Ok, Thank you.

ASSISTANT:  Thank you for availing us.