You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Steven Campbell.

ASSISTANT: How can I assist you Campbell?

USER: I want a flight with fare 500 can you help me in booking a flight?

ASSISTANT: May I know your departure date please?

USER: My journey starts on 11/12 from Chicago.

ASSISTANT: Can I know your departure airport code please?

USER: My source airport code is ORD.

ASSISTANT: Do you have any other specifications?

USER: I want a direct flight.

ASSISTANT: Can you please share your return date?

USER: My return date is 11/14.

ASSISTANT: Please share your destination airport code?

USER: My destination is MSP.

ASSISTANT: Wait a while, I will check and inform you.

USER: Ok.

ASSISTANT: There is no flight available on your desired date with 0 connection.

USER: No problem, thank you for your time.

ASSISTANT: Thanks for opting us.