You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I am John Williams. Can you help me to search a flight with 500 price limit?

ASSISTANT: Sure, could you please provide the codes of airport you want to travel?

USER: My airport codes are DTW and DFW.

ASSISTANT: Ok, may I know your travelling dates to search for the flight?

USER: My journey dates are 11/28 and 11/30.

ASSISTANT: Ok, please hold on for a moment.

USER: Sure.

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

USER: Yes, proceed.

ASSISTANT: Ok, your booking is done.

USER: Thank you.

ASSISTANT: You are welcome, have a great journey.