You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Can you please help me to book a ticket from DCA to HOU?

ASSISTANT: Sure, let me know about the planned travel dates.

USER: I want to start on Aug 20 and return on Aug 22.

ASSISTANT: Do you have any specifications in connection limit?

USER: I need a connecting flight.

ASSISTANT: Is there any class preference for this journey?

USER: No.

ASSISTANT: Please provide me the name.

USER: Anna Robinson here.

ASSISTANT: Do you have any other specifications?

USER: I want to depart in the afternoon time.

ASSISTANT: Here, I found a flight with 1 connection and airfare is about 100. Shall I proceed in booking?

USER: You can proceed.

ASSISTANT: In a business class, your ticket has been confirmed for the flight 1009 in Delta Airlines.

USER: Thank you.

ASSISTANT: Thank you for reaching us.