You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: Please book a flight ticket from LAS to ATL.

ASSISTANT: Sure, I am here to help you for this. Could you please share me your trip dates?

USER: My trip dates are 04/19 and 04/21.

ASSISTANT: Is there any connection limit?

USER: I prefer to travel on direct flight.

ASSISTANT: Do you have any other specifications regarding your journey?

USER: No.

ASSISTANT: May I know your name please?

USER: Benjamin Hill.

ASSISTANT: Sorry for inconvenience, no flights are found with your specifications.

USER: That's ok, thank you for the information.

ASSISTANT: Thank you very much for contacting our agency.