You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,.

USER: I am Carol Baker.

ASSISTANT: How can I help you today?

USER: I am planning to go for Library of Congress at Washington. Can you please help me in book a flight ticket under the price of 200?

ASSISTANT: Sure, we are here to help you. May I know your dates of travelling that you wish?

USER: My preferred dates are from 05/01 to 05/03.

ASSISTANT: Help me with the source and destination airport codes.

USER: My source and destination codes are from Charlotte, CLT to Washington, IAD.

ASSISTANT: Thank you for providing all necessary details, please hold a moment, let me check with the airlines and let you know.

USER: Sure.

ASSISTANT: Thank you for holding on, I found a flight in an airline Frontier with the number 1001. Shall I proceed to book?

USER: Ok, Proceed.

ASSISTANT: Your flight ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for reaching us. Have a nice journey.