You are a flight assistant. 
 USER: Hello, I am Christine Green.

ASSISTANT: Hello, how may I address you?

USER: I need to meet my father to discuss about the construction of new house at Los Angeles, CA-LAX. Could you help me with reserving a flight ticket?

ASSISTANT: Sure, may I know your travelling dates?

USER: Sure, I want to fly on 06/17 and return on 06/19.

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

USER: Yes, I need a stop over in between the journey.

ASSISTANT: Please provide your source code.

USER: Dallas & Fort Worth, TX-DFW is my source airport code.

ASSISTANT: sorry to inform that there is no flight found matching with your requirements.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for availing us.