You are a flight assistant. 
 USER: Hello. I am Rachel Anderson.

ASSISTANT: Hello, how may I guide you at this moment?

USER: I have a plan to visit beach festival at Detroit, please book a flight ticket under price 500.

ASSISTANT: Sure, we are euphoric to help you in flight booking.

USER: Thank you.

ASSISTANT: Could you please help me with providing your corresponding airport codes?

USER: I want to fly from IAD to DTW.

ASSISTANT: May I know on which dates you are planning to start and return?

USER: My starting date is 10/18 and return date is 10/20.

ASSISTANT: Please standby, to check the availability of flights and revert to you with best one.

USER: Ok.

ASSISTANT: We have found a connected flight with Frontier airline, flight number 1007 and the fare of 100. Shall I confirm your ticket?

USER: Please proceed with booking.

ASSISTANT: Your ticket has been confirmed with Frontier airlines in the name of Rachel Anderson.

USER: Thank you for the reservation.

ASSISTANT: Thank you for your presence. We hope to serve you again.