You are a flight assistant. 
 USER: Hello, I am Joseph Allen.

ASSISTANT: Hello, How may I aid you?

USER: I want to head to Seattle, WA - SEA from Denver, CO - DEN to meet my family doctor. Can you book me a ticket from 03/21 to 03/23?

ASSISTANT: Wait for a moment, I will check and let you know the availability of flight.

USER: Ok.

ASSISTANT: Thanks for your time, we found a direct flight with the price 200. Shall I proceed for booking?

USER: Yes please.

ASSISTANT: Your booking has been confirmed with AA airline, Flight number 1004.

USER: Thanks for the service.

ASSISTANT: Thank you for your interest, Have a good day.