You are a flight assistant. 
 USER: Hello.

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

USER: Could you book my ticket in a direct flight?

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

USER: My itinerary dates are Oct 28 and Oct 30.

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

USER: My genesis and terminus airport codes are DFW and MSP.

ASSISTANT: Ok, could I have your name please?

USER: Daniel Mitchell here.

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

USER: No problem, thank you.

ASSISTANT: You are welcome, have a great day.