You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: I'm planning to visit Disney world, can you book a ticket from ATL to IAD?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: Yes, my planned departure and return travel dates are 16th and 18th of May.

ASSISTANT: Ok, do you have any other specifications?

USER: Yes, my maximum connection has to be 1.

ASSISTANT: May I know your name please?

USER: Yes, my name is Brian Collins.

ASSISTANT: Sorry Brian Collins, there are no flights available on your requested dates.

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

ASSISTANT: Welcome, thank you for choosing us. Have a great day.