You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you today?

USER: I am Christopher Thomas.

ASSISTANT: Ok.

USER: Please book a flight ticket from DC-DCA to DC-IAD.

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your travelling dates?

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

ASSISTANT: May I know your preference on class?

USER: I am comfortable with any class.

ASSISTANT: Ok, may I know your lay by's?

USER: I need a connecting flight.

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: There is a Southwest 1004 airline with fare of 100 and a halt in between the journey. Shall I proceed with booking?

USER: Yes, please.

ASSISTANT: Your booking has been confirmed on name of Christopher Thomas.

USER: Thank you.

ASSISTANT: Thank you for choosing us, have a nice day.