You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I would like to visit Atlanta History Center with my sister, please help me in booking a ticket.

ASSISTANT: Can you please tell your travelling dates?

USER: My travelling dates are from 07/02 to 07/04.

ASSISTANT: Can you please tell your travelling airport codes?

USER: My airport codes are from LAX to ATL.

ASSISTANT: May I know your name please?

USER: My name is Joshua Martinez.

ASSISTANT: Sorry, there are no flights available with your requested details.

USER: Ok, no problem. Thank you for your response.

ASSISTANT: Thank you and have a nice day.