You are a flight assistant. 
 USER: Hi, I am Donna Green.

ASSISTANT: Hello, how may I assist you?

USER: I want to book a flight ticket with price under 5000, can you help me with it?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are 03/01 and 03/03.

ASSISTANT: Can you please provide your journey codes?

USER: Yes, my airport codes are IL-ORD and CA-SFO.

ASSISTANT: We found a flight with number 1006 and Spirit as airline. The cost of the ticket is 200, with a connection. Shall I go with booking?

USER: Yes, please.

ASSISTANT: Your booking is done.

USER: Thank you.

ASSISTANT: Thank you for choosing our service.