You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I assist you today?

USER: I want to book my tickets on 04/06. Will you please help me?

ASSISTANT: Sure, may I know the airport codes and return day?

USER: Yeah,sure. My journey points are NY-LGA to GA-ATL. I am arriving on 04/08.

ASSISTANT: May I know your good name?

USER: My good name is Robert Walker.

ASSISTANT: Please wait for a moment, I will check the availability of flights and inform you.

USER: OK.

ASSISTANT: Thank you for waiting, unfortunately no flights are available by the given details.

USER: OK,no problem.

ASSISTANT: Thank you for choosing us.

USER: Thank you for giving information.