You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I assist you?

USER: I am Helen Roberts, I would like to surprise my parents by going home . Could you please reserve a direct flight ticket which is going to Atlanta.

ASSISTANT: Sure, Please share me your price limit for this journey.

USER: I need the ticket within price 200.

ASSISTANT: Ok, kindly mention your airport codes.

USER: My nearest airport is Los Angeles, so I want to fly from CA- LAX to GA- ATL.

ASSISTANT: Please let me know your preferable travelling dates.

USER: My preferred travelling dates are from 05/26 to 05/28.

ASSISTANT: Sorry for the inconvenience, There are no flights found with your requirement.

USER: Ok, that's fine. Thank you.

ASSISTANT: Our pleasure, have a nice day.