You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I want to change my recent reservation, can you help me with it?

ASSISTANT: Sure, may I know your good name?

USER: Thank you, my name is Joseph King.

ASSISTANT: Please hold on, I will be back and revert you.

USER: OK.

ASSISTANT: No reservation found on your name.

USER: Ok, no problem. Leave it.

ASSISTANT: Thank you for choosing us, have a nice day.

USER: Thanks for the kind information.