You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what kind of service you are looking for?

USER: I want to conduct a science festival at Charlotte. So, can you help me in booking a flight on Apr 15?

ASSISTANT: Sure, I am here to help you with that.

USER: Thank you.

ASSISTANT: I need your source and destination airport codes, please share it.

USER: My source airport code is OAK and destination airport code is CLT.

ASSISTANT: Ok, I need your return date.

USER: I will return on Apr 17.

ASSISTANT: May I know your good name please?

USER: Sure, myself Carol Baker.

ASSISTANT: We found a connecting flight in Spirit airlines under economy class, shall I make it confirm?

USER: Sure, proceed with my booking.

ASSISTANT: Ok, your booking has been confirmed with 1015 flight.

USER: Thank you for your kind help.

ASSISTANT: Than for opting us to serve you, have a safe journey..