You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I would like to book a ticket from ATL to LAS, can you please help me out?

ASSISTANT: Sure, I will aid you with the ticket booking. Can I know your travel dates?

USER: I am travelling on these dates April 10th and 12th.

ASSISTANT: May I know your name please?

USER: William Davis here.

ASSISTANT: Do you have any specifications?

USER: I need single connected flight.

ASSISTANT: Sorry to inform you that, there are no flights available in this route on the dates you have given.

USER: Ok no problem, thank you for your services.

ASSISTANT: You are welcome. Thank you for opting us.