You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I guide you at this moment?

USER: I am Elizabeth Hall, can you help me to book a flight from DEN to IAD?

ASSISTANT: Sure, I am ravish to help you.

USER: Thank you.

ASSISTANT: May I know on what dates would you like to travel?

USER: My travelling dates are June 28 and 30.

ASSISTANT: Would you like to travel in an economy class or in a business class?

USER: I am fine any class.

ASSISTANT: Ok, please wait a moment. let me search a flight for you.

USER: Please search for a connecting flight.

ASSISTANT: Ok. There is a connecting flight found in Southwest airline of flight number 1020 and fare is 100.Shall I proceed for booking?

USER: Proceed with my booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Most welcome.