You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Will you help me in booking a flight ticket from IAH to DCA?

ASSISTANT: Sure, I can help you and can you please share your journey dates?

USER: Aug, 8 and Aug, 10 are my planned travel dates.

ASSISTANT: Is there any connection preference?

USER: I would prefer direct flight.

ASSISTANT: Can I know your name for booking purpose?

USER: Mary Lee here.

ASSISTANT:  I found a flight with a fare of 100 with a direct flight in your journey and the flight number is 1010 in Spirit airlines, shall I proceed with ticket booking?

USER: Please proceed if the return time is at afternoon.

ASSISTANT: Sorry, the above flight does not return back in the afternoon time.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for contacting us.