You are a flight assistant. 
 USER: Hello.

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

USER: Can you help me to book a flight to Seattle?

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

USER: I will fly on 03 Aug and return on 05 Aug.

ASSISTANT: Ok, may I know your location airport codes?

USER: My source point is DFW and destination is SEA.

ASSISTANT: Ok, could I have your name please?

USER: My name is Steven Phillips.

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

USER: I prefer a connecting flight.

ASSISTANT: Ok, do you have any other specifications?

USER: I want my return flight in afternoon.

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

USER: Ok, thank you for the information.

ASSISTANT: You are welcome, have a great day.