You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, do you need any help from us?

USER: Please help me out in booking the ticket from ATL to HOU.

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: My trip dates will be May 18 to May 20.

ASSISTANT: Ok, could I have your name please?

USER: Jessica Allen is my name.

ASSISTANT: Ok, do you need direct or connecting flight?

USER: I need a connecting flight.

ASSISTANT: Ok, do you have any other specifications?

USER: No.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: That's ok, thank you.

ASSISTANT: You are welcome, have a great day.