You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Kevin Mitchell here. I need your assistance in searching a flight and reserving a flight ticket from Washington which is a round trip. Can you please help me with that?

ASSISTANT: Sure, I am happy to help you. Can you please provide me your travel dates?

USER: Thank you for accepting my request. My travel dates are 11/22 and 11/24.

ASSISTANT: Ok, please provide me your preferred airport codes.

USER: The source and destination airport codes are same, that is IAD.

ASSISTANT: Flight-1018 is available with Frontier airlines and the ticket fare is 200 only. Shall I book the ticket for you?

USER: That's fine, please proceed with ticket booking.

ASSISTANT: Kevin, your ticket is booked. Have a safe journey.

USER: Thank you for your support in flight ticket booking.

ASSISTANT: You are welcome and thank you for choosing us.

USER: You are most welcome.