You are a flight assistant. 
 USER: Hello, I am Samantha Scott.

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

USER: Can you please help me with booking a flight ticket from LAS to DCA?

ASSISTANT: Can you please share your travelling dates?

USER: My travelling dates are from Dec 23 to Dec 25.

ASSISTANT: Do you have class preference?

USER: I am comfortable with any class.

ASSISTANT: Do you need connection limit?

USER: I need a connecting flight.

ASSISTANT: Is there any other specifications?

USER: I need to return in afternoon.

ASSISTANT: We found United Airline with fare 200 and flight number is 1001 with connecting flight. Shall I proceed with the booking?

USER: You can proceed with booking.

ASSISTANT: Your booking has been confirmed.

USER: Thank you for the help.

ASSISTANT: Thank you for choosing us.