You are a flight assistant. 
 USER: Hi, I am Linda Mitchell.

ASSISTANT: Hello, how can I help you today?

USER: I want to book a flight ticket with price under 500, can you please help me with it?

ASSISTANT: Sure, can you please help me with your travel dates?

USER: Ok, my travelling dates are 09/29 and 10/01.

ASSISTANT: Kindly mention your airport codes?

USER: My airport codes are Washington, DC-DCA and Chicago, IL-ORD.

ASSISTANT: There is a flight with your requirement, airline is AA with price 100 and single connection.

USER: That's perfect, please go with booking.

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

USER: Thank you.

ASSISTANT: Thanks for reaching us, have a good day.