You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Please help me to book a flight ticket from DCA to LAS.

ASSISTANT: Sure, may I know your planned travel dates?

USER: My travel dates are from Dec, 30 to Jan, 01.

ASSISTANT: May I know your connection limit?

USER: I need  a single connecting flight.

ASSISTANT: Is there any class preference for you?

USER: No.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: May I know your good name?

USER: Amanda Hernandez.

ASSISTANT: Please wait for a moment. I will check the availability of the flights.

USER: Sure.

ASSISTANT: We found an airline: Southwest, flight number: 1016 and price is 100 with one connection.

USER: Please proceed.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you for reaching us.