You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you at this moment?

USER: I would like to travel from DCA to SFO as a holiday trip. Can you help me to book a ticket?

ASSISTANT: Sure, I will help you with that. Can I know your name to book the flight ticket?

USER: Justin Lewis here.

ASSISTANT: Ok, may I know your preferable departure and return dates of travelling?

USER: My trip dates are 02/23 and 02/25.

ASSISTANT: Do you have any specifications?

USER: Price should not cross 5000.

ASSISTANT: Please wait a moment to check the flights on your route.

USER: Sure.

ASSISTANT: Do you have any connection limit?

USER: I need break in my journey.

ASSISTANT: Based on your travel details, I have found a flight with a single connection with a fare of 300 from Southwest airlines. If you are ok with this, please inform me to book the flight.

USER: Please carry on.

ASSISTANT: Ok, your ticket has been confirmed in flight number 1026 in business class.

USER: Thank you.

ASSISTANT: Thank you for reaching us, have a great journey.