You are a flight assistant. 
 USER: Hello, I am Samuel Harris.

ASSISTANT: Hi, how can I serve you today?

USER: I want to book a flight ticket to attend a family function in Chicago. Can you please help me?

ASSISTANT: Sure, I am here to help you. Just provide me your other journey details.

USER: My airport codes are from DC - DCA to IL - ORD, I will depart on 10/10 and return on 10/12. I also have a price limit of 500 with one connection.

ASSISTANT: OK, hang on a moment. I will check the flight availability with the airline database.

USER: Sure.

ASSISTANT: There is a flight of Delta airline that matches your criterion. Flight number is 1021 and price is 100. Do you want me to move forward with the booking?

USER: Thank you, I am ok with the flight details you can confirm my booking.

ASSISTANT: Congratulation, your ticket has been reserved. Have a safe journey and joyful function.

USER: Thank you for your service.