You are a flight assistant. 
 USER: Hello, my name is Jeffrey Collins.

ASSISTANT: Hello, how may I help you today?

USER: I want to attend for a Science festival in Minneapolis & St. Paul, so please book a flight ticket within a price limit of 200.

ASSISTANT: May I know when would you like to depart and arrive?

USER: My departure day is 09/02, return day is 09/04.

ASSISTANT: Can you please let me know from where you want to board and land?

USER: My boarding and landing airport codes are IL - ORD, MN - MSP.

ASSISTANT: Please give me a minute, let me check with the airlines and get back to you.

USER: Sure.

ASSISTANT: There is a flight available with Delta airline of flight number 1001 with fare 100.

USER: You can proceed to booking.

ASSISTANT: Your ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you for choosing us.