You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Alexander Hill. Can you please help me to book a flight ticket from CLT to DCA?

ASSISTANT: Your travelling dates please?

USER: My travelling dates are Jan 12 to Jan 14.

ASSISTANT: There is a flight with single connection, can I proceed for booking in 1021 flight?

USER: Ok, please proceed to book.

ASSISTANT: Your booking is done in Southwest airlines.

USER: Thank you for your booking.

ASSISTANT: Thank you for choosing us.