You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello,how could I help you?

USER: I need to a book ticket, please help me out.

ASSISTANT: Can you please provide your travelling information?

USER: I am travelling from Dallas & Fort worth,TX- DFW on Sep 19.

ASSISTANT: Can I know your destination?

USER: My destination is Seattle, WA-SEA on Sep 21.

ASSISTANT: OK, Wait a minute.

USER: Sure.

ASSISTANT: Can I know your name?

USER: My name is Stephen Hill.

ASSISTANT: There is flight which matches you, the details are as follows flight number is 1001, price : 200, Airline: Southwest.

USER: OK, please check with this reservation is these a direct flight.

ASSISTANT: Sorry to tell that there is no direct flight.

USER: OK, thank you.

ASSISTANT: Thank you, Have a great day.