You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I would like to meet my friend at Los Angeles, can you please book my flight ticket from JFK to LAX?

ASSISTANT: Sure, We are here to help you. Can I know your travelling dates?

USER: I will depart on Sept 10th and return back on Sept 12th.

ASSISTANT: Do you need any break?

USER: No, I prefer for a direct flight.

ASSISTANT: Is there any other specifications?

USER: No.

ASSISTANT: May I know your name?

USER: My name is Justin Perez.

ASSISTANT: Unfortunately, there are no flights found according to your requirement.

USER: Oh! Not an issue. Anyway, thank you for checking.

ASSISTANT: Thank you for reaching us.