You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, could you please tell us for what help you approached us?

USER: I am looking for a flight from AUS to DFW, can you help me?

ASSISTANT:  Sure, may I know your departure and arrival day?

USER: I want to take off on 16 Jan and return on 18 Jan.

ASSISTANT: Ok, could I have your name please?

USER: I am Andrew King.

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

USER: I need a connecting flight.

ASSISTANT: Ok, do you have any other specifications?

USER: I prefer to travel in economy class.

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

USER: It's ok, not a problem, thank you.

ASSISTANT: You are welcome, have a great day.