You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: My name is Ruth Hall, I want to book a flight ticket within a price limit of 500 to visit a Willis Tower in Chicago.

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: I would like to fly on 10/27, return on 10/29.

ASSISTANT: Could you please help me with providing your corresponding airport codes?

USER: My source and destination airport codes are CA - OAK, IL - ORD.

ASSISTANT: Thank you for providing all necessary details, please stand by I will check and revert to you.

USER: Sure.

ASSISTANT:  Thanks for waiting, we are pleased to inform you that we have found a AA airline, flight number-1018connections-1 and price limit is 100.

USER: Please proceed to booking.

ASSISTANT: Your booking is done.

USER: Thank you for your good service.

ASSISTANT: Thanks for reaching us.