You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Please book a ticket from DCA to IAH to attend Board meeting.

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My trip dates are Dec 18 and Dec 20.

ASSISTANT: Do you have any other specifications?

USER: I want single connected flight.

ASSISTANT: Please help me with your name for booking.

USER: I am Susan Evans.

ASSISTANT: According to your information, I have found a flight with single stop over in your journey with a minimum fare of 100 with flight number 1016. Shall I proceed with this flight?

USER: Ok, please proceed.

ASSISTANT: Your booking is done.

USER: Thank you.

ASSISTANT: Most welcome.