You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello. How can I help you today?

USER: I am Dennis Green,could please help me in booking a ticket?

ASSISTANT: Sure Dennis, may I know your source and destination details?

USER: My source of journey is from Denver,CO-DEN to Destination Chicago,IL-ORD.

ASSISTANT: OK, could you please mention me your departure and arrival dates?

USER: My travelling dates are from 11/17 to 11/19.

ASSISTANT: OK, wait a moment meanwhile I'll check the details of the flight.

USER: I am looking for a flight with 1 connection.

ASSISTANT: Thank you for patience. Sorry, I cannot find any flights with 1 connection.

USER: Ok,thank you for helping me.

ASSISTANT: Thank you, have a good day!.