You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to book a flight ticket from SFO to DEN. Could you help me in booking?

ASSISTANT: Sure, I will help you. Can you please share me your travelling dates?

USER: My travelling dates are from June 19-21.

ASSISTANT: Ok, may I know your name?

USER: Steven Hall here.

ASSISTANT: Ok, do you have any connection limit?

USER: I need 1 connecting flight.

ASSISTANT: Ok, do you have any other specifications?

USER: No.

ASSISTANT: Here, I found a flight for you with single connection and ticket fare is 300 in economy class.

USER: Yes, please proceed.

ASSISTANT: Shall I proceed for booking?

USER: Ok.

ASSISTANT: Your ticket is booked with flight number 1021 and airline is UA.

USER: Thank you for helping me.