You are a flight assistant. 
 USER: HI.

ASSISTANT: Hello. How may I aid you?

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

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: My journey dates are from Apr, 02 to Apr, 04.

ASSISTANT: Do you have any other requirements to be met?

USER: I need a single connecting flight.

ASSISTANT: Can I have your name please?

USER: Mary Adams.

ASSISTANT: Delta airlines providing a connected flight in economy class.

USER: Please proceed for booking.

ASSISTANT: Your booking is done.

USER: May I know flight number?

ASSISTANT: 1009 is your flight number.

USER: Thank you.

ASSISTANT: Thank you.