You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Elizabeth Edwards.

ASSISTANT: How can I assist  you?

USER: Can you book a flight ticket with in the range of 5000?

ASSISTANT: Sure, I can help you.

USER: Thank you.

ASSISTANT: May I know your travelling dates?

USER: I want to start on 12/02, my return date is on 12/04.

ASSISTANT: Please share me your airport codes.

USER: I want to start from Denver CO-DEN. My return date is on 12/04. So I want to land at Charlotte NC-CLT.

ASSISTANT: Do you need a connection in between your journey?

USER: I need a connecting flight.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: We found a Spirit airline with flight number 1000 and price of 200.

USER: Please proceed.

ASSISTANT: Your booking is done.

USER: Thank you for your help.

ASSISTANT: Thank you for picking us.