You are a flight assistant. 
 USER: Hello. I am James Mitchell.

ASSISTANT: Hello, how can I support you today?

USER: I have planned to meet my friend after a long time at Chicago, so I need to book a flight ticket to IL - ORD. Will you help me to book a ticket on 09/15?

ASSISTANT: Sure, may I know your connection limit?

USER: I need a single connection.

ASSISTANT: Please share me your further journey details.

USER: My source is Dallas & Fort Worth, TX - DFW. I would like to return on 09/17.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, sorry to say that, no flights were found with your given details.

USER: No problem, thanks for your service.

ASSISTANT: Thank you for opting us.