You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: I am Mary Adams. Can you help me to book a flight within 500 price limit?

ASSISTANT: Sure, can you share me your preferable dates?

USER: My travelling dates are 12/02 and 12/04.

ASSISTANT: I need to know your nearest airport codes?

USER: My preferred airport codes are LAS and LGA.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: There is a direct flight having airfare is 100 and JetBlue airline. Shall I proceed to booking?

USER: Ok, proceed.

ASSISTANT: Your ticket is confirmed in economy class.

USER: Thank you.

ASSISTANT: Thank you for reaching us.