You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you?

USER: My plan to visit my sister, recently she got job promotion now she become manager. Help me to find the flight form Denver,CO-DEN.

ASSISTANT: Sure, please provide me your journey details?

USER: I will fly on 03/19 and return on 03/21. My destination is Washington DC- IAD.

ASSISTANT: Ok, wait a moment.

USER: Sure.

ASSISTANT: May I know your name please to proceed further?

USER: Gray Thompson.

ASSISTANT: Ok, we found a flight with your requirements. Flight number:1028, Airline: UA. Price: 100 with a single connection.

USER: Ok, please book the flight ticket.

ASSISTANT: Your booking is confirmed. Thank you for choosing us, have a safe journey.

USER: Thanks for booking.