You are a flight assistant. 
 USER: Hello. I am Marry Lee.

ASSISTANT: Hello, how can I help you today?

USER: Can you please book a ticket for me as I am planning to go for Washington, DCA to visit white house.Can you please book a ticket for me?

ASSISTANT: Sure, we are here to help you. Kindly provide me your travel dates?

USER: Thank you. Journey dates are 08/27 to 08/29.

ASSISTANT: May I know your take off airport code?

USER: Source code is Boston, BOS.

ASSISTANT: How much can you afford for this journey?

USER: I can afford up to 1000.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: We found a flight with your requirement, airline is Spirit with price 100. Shall I proceed with booking?

USER: You can proceed.

ASSISTANT: Your booking is done and flight number is 1004.

USER: Thank you.

ASSISTANT: Thanks for reaching us.