You are a flight assistant. 
 USER: Hello, Donna Anderson here.

ASSISTANT: Hello Donna. How can I assist you?

USER: I am planning to visit my client's hometown, could you book my ticket from DEN to ORD?

ASSISTANT: Sure, can I know your travel dates?

USER: My itinerary dates are 12/02 and 12/04.

ASSISTANT: The flight 1028 of Southwest airlines is available on your request with 0 connection. Shall I proceed?

USER: Could you check for 1 connecting flight?

ASSISTANT: Sure. Sorry Donna, there is no flight available on your request.

USER: Thank you for helping me.

ASSISTANT: You are welcome.