You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I would like to change my previous travel dates, which is done recently. Can you please help me out?

ASSISTANT: Sure, can I have your name please?

USER: Thank you for considering my request. Myself Dorothy King.

ASSISTANT: Ok, please wait for a while.

USER: Sure, I will wait for your positive response.

ASSISTANT: Thanks for waiting, there is no active reservation on your given name.

USER: Not an issue with this one, anyway thank you for the information.

ASSISTANT: Thank you for opting us.