You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Benjamin Lopez, can you help me to book a flight within 500 price limit?

ASSISTANT: I am here to help you, may I know your journey dates?

USER: My travelling dates are 12/25 and 12/27.

ASSISTANT: Fine, let me know your locations too.

USER: My preferable airport codes are LGA to MSP.

ASSISTANT: Hold on a moment please.

USER: Ok.

ASSISTANT: Thanks for your patience, there is a connecting flight-1013 with price 100. Shall I book it?

USER: Proceed with booking.

ASSISTANT: Ok, booking is done on AA airlines.

USER: Thank you.

ASSISTANT: Thanks for reaching us, have a safe trip.