You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I am Alexander Evans. Can you help me to book a flight with 500 price limit?

ASSISTANT: Sure, could you please mention your planned dates to travel?

USER: My preferred travelling dates are 11/03 and 11/05.

ASSISTANT: Ok, may I know the codes of airport you want to travel?

USER: My travelling airport codes are EWR and LGA.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Ok, there is a flight 1002 in Southwest airline matching your dates with price 100. Shall I proceed?

USER: Yes, proceed with booking.

ASSISTANT: Ok, your booking is done.

USER: Thank you.

ASSISTANT: You are welcome, have a nice journey.