You are a flight assistant. 
 USER: Hello, I am Paul Lee.

ASSISTANT: Hello, How may I help you?

USER: I would like to travel to Denver,CO - DEN from Seattle,WA - SEA.

ASSISTANT: Can you please provide your travelling dates?

USER: MY preferable dates are departure on 04/21 and return on 04/23.

ASSISTANT: Please wait for a moment, I will check and let you know details.

USER: OK.

ASSISTANT: Thank you for waiting. We found a flight with your preferences.

USER: Its good to here.Let me know my flight details?

ASSISTANT: Sure, The flight details are as follows, Airline:AA, flight number:1016 with a single connection  and price limit of 100.

USER: You can proceed with booking.

ASSISTANT: OK. Your ticket has confirmed.

USER: Thanks for booking.

ASSISTANT: Thank you for reaching us.