You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Please help me to book a flight ticket from DFW to IAD.

ASSISTANT: Sure, can you provide me with the travel dates please?

USER: My trip dates are from Aug, 26 to Aug, 28.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: May I know if you have any airline preference?

USER: I prefer normal-cost airlines.

ASSISTANT: Is there any time concern?

USER: No.

ASSISTANT: Is there any connection limit?

USER: I need a single connecting flight.

ASSISTANT: May I know your name please?

USER: I am Gregory Mitchell.

ASSISTANT: Give me a moment.

USER: Ok.

ASSISTANT: Delta Airlines with flight 1005 is providing service on your route with connecting flight and  cost of 200.

USER: Please proceed.

ASSISTANT: Your ticket is booked where departure DFW 1:00 AM Aug 26 and arrival IAD 6:00 AM Aug 28.

USER: Thank you for booking.

ASSISTANT: Thank you for reaching us.