You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you at present?

USER: Can you please help me to book a flight from DCA to IAH?

ASSISTANT: Sure, please share me your trip dates.

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

ASSISTANT: Do you need direct flight or connecting flight?

USER: I need a connecting flight.

ASSISTANT:  If you can help me with your name, I can begin looking up for the availability of flights.

USER: Carolyn Jones here.

ASSISTANT: May I know if you prefer to have any other comforts in your journey?

USER: I do not have any other specifications.

ASSISTANT: Thank you for waiting and we have found a flight in an economy class with 1 connection in United Airlines and the fare of your flight will be 100. Do you like me to proceed your booking with this flight?

USER: Ok, please proceed.

ASSISTANT: Your booking is done with flight number 1001.

USER: Thank you.

ASSISTANT: Thank you for contacting us.