You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can help you?

USER: I am looking to book a flight ticket to meet my friend in Denver. Can you help me for booking a flight ticket from BOS to DEN?

ASSISTANT: Sure, can you give me your travel dates?

USER: My travelling dates are Oct 20 and Oct 22.

ASSISTANT: Do you want any connections?

USER: I need a single connecting flight.

ASSISTANT: Do you have ant class preferences?

USER: My class preference is economy.

ASSISTANT: May I know your name please?

USER: My name is Alexander Williams.

ASSISTANT: Direct flight number 1023 with price 100 in economy class is available. Is it ok for you?

USER: Ok, proceed for booking.

ASSISTANT: Your ticket has been booked. Depart time is 9:00AM and arrival time is 21:00PM.

USER: Thank you for booking.

ASSISTANT: Thank you for reaching us.

USER: Welcome.