You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to book a flight ticket from CO-DEN and return to CA-OAK to meet my childhood friend.

ASSISTANT: Sure, please specify your price limit?

USER: My price limit is 1000.

ASSISTANT: Ok, let me know your travelling period, please?

USER: Sure, my travelling dates are from 09/26 to 09/28.

ASSISTANT: Delta airline of 1012 flight available with single connection.

USER: Ok, you can proceed for booking.

ASSISTANT: Ok, let me know your name to book a ticket, please?

USER: My name is Jonathan Jones.

ASSISTANT: Your ticket booking has been confirmed.

USER: Thanks for your service.

ASSISTANT: Thank you for opting us. Have a safe flight.