You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Kathleen Helen here. I am looking for a flight from DEN to ORD. Can you please help me with booking?

ASSISTANT: Sure. Let me know your travelling dates.

USER: My travel dates are Aug 19 and Aug 21.

ASSISTANT: Do you have any preference?

USER: I need a connecting flight in my journey and my return time is evening.

ASSISTANT: Found ticket with airline JetBlue for price 200 having flight number 1027.

USER: Yes, please proceed with that flight ticket booking.

ASSISTANT: Ticket is booked.

USER: Thank you for helping me.