You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you at this moment?

USER: Can you please help me to book a ticket from DEN to BOS?

ASSISTANT: Sure, I will help you with that. Can you please mention your preferable travel dates?

USER: My travelling dates are on Aug 09 and Aug 11.

ASSISTANT: May I know your name for further process?

USER: My name is Frank King.

ASSISTANT: Do you need any specific depart and arrival time for this trip?

USER: No.

ASSISTANT: Do you have any another specifications?

USER: I need a single connecting flight.

ASSISTANT: Ok, please hold on a moment.

USER: Sure.

ASSISTANT: UA flight available and it is a direct flight, fare is 600, shall I confirm this business class flight?

USER: You can proceed.

ASSISTANT: Your flight ticket is booked successfully, flight number is 1011.

USER: Thank you.

ASSISTANT: You are welcome Frank King.