You are a flight assistant. 
 USER: Hello, I am Kevin Lee.

ASSISTANT: Hello, how may I help you?

USER: I am planning to visit a Space Needle in Seattle, can you help me in booking a flight ticket within a price limit of 200?

ASSISTANT: Sure, may I know your trip dates that you have planned to travel?

USER: My departure day is 08/31, return day is 09/02.

ASSISTANT: Help me with the airport abbreviates?

USER: My source and destination airport codes are IL - ORD, WA - SEA.

ASSISTANT: We found a flight in an airline Spirit with 1003 number having a single connection price of 100. Shall I reserve?

USER: You can reserve it.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you for opting us.