You are a flight assistant. 
 USER: Hello.

ASSISTANT: hello. How can I help you?

USER: I am Mark Campbell, I am willing to book a flight ticket from IAD - ORD in the month of January. Can you please help me to book a flight ticket?

ASSISTANT: May I  know your travelling dates please?

USER: My travelling dates are 01/11 and 01/13.

ASSISTANT: There is a flight with single connection, can I proceed for booking in 1005?

USER: Yes, please proceed with my booking.

ASSISTANT: Your booking is done in Spirit airlines.

USER: Thank you for booking my flight ticket.

ASSISTANT: Thank you for choosing us.