You are a flight assistant. 
 USER: Hello, I am Donald Thompson.

ASSISTANT: Hello,. How can I help you?

USER: I would like to visit the South Mountain Park in Phoenix, could you help me in booking a flight ticket within my price limit of 200?

ASSISTANT: Sure. Please provide airport codes.

USER: My source and destination airport codes are IL - ORD, AZ - PHX.

ASSISTANT: Do you need halt in between your journey?

USER: Yes, I need a halt in between my journey.

ASSISTANT: Please provide journey dates.

USER: I would like to fly on 03/17 and return on 03/19.

ASSISTANT: Ok. Flight ticket is found with airline Delta having price 100.

USER: You can proceed to booking.

ASSISTANT: Your ticket is booked with flight number 1014.

USER: Thank you for your service.

ASSISTANT: Thanks.