You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you for the day?

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

ASSISTANT: Sure, can you please help me with your travel dates?

USER: My travel dates are from Aug 20th to Aug 22nd.

ASSISTANT: Do you need any stopover in between your journey?

USER: Yes, I would prefer a single stopover in between my journey.

ASSISTANT: Do you have any other specifications?

USER: Yes, I want to return in the afternoon.

ASSISTANT: Ok, please wait a minute.

USER: Ok.

ASSISTANT: We found an airline Southwest with flight 1011 having a fare 200 with stopover and return time is 15:00 hours. Shall I proceed to book?

USER: Yes, please proceed.

ASSISTANT: May I know your name?

USER: I am Debra Taylor.

ASSISTANT: Your reservation has been processed.

USER: Thank you.

ASSISTANT: Thank you.