You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

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

ASSISTANT: Can you please share your travelling dates?

USER: My travelling dates are from Sept 03-05.

ASSISTANT: Do you have class preference?

USER: I prefer economy class.

ASSISTANT: Do you need connection limit?

USER: I would be comfortable with single stop over.

ASSISTANT: May I know your name?

USER: Virginia Collins here.

ASSISTANT: We found Southwest Airline with fare 100 and flight number is 1009 with connecting flight. Shall I proceed with the booking?

USER: You can proceed with booking.

ASSISTANT: Your booking is done.

USER: Thank you for the help.

ASSISTANT: Thank you for choosing us.