You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may assist you?

USER: Carol Parker here. I'm planning to visit my native place, can you please book a ticket from DFW to DEN?

ASSISTANT: Sure,please provide your travelling dates.

USER: Sure, my planned departure and return travel dates 17th and 19th of September.

ASSISTANT: Do you have any specifications?

USER: Yes, I need a direct flight.

ASSISTANT: We found a flight with airlIne AA, flight 1001. with connecting one can I proceed.

USER: I have already mentioned you that I need direct flight. Why are you again showing me the flight with 1 connection?

ASSISTANT: Sorry to inform you that, we are unable to provide direct flight now.

USER: That's ok, thank you for giving the information.

ASSISTANT: Thank you for reaching us.