You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Virginia Johnson.

ASSISTANT: How may I guide you now?

USER: I am planning to visit Houston, HOU. Could you please reserve me the flight ticket from Detroit, DTW?

ASSISTANT: Virginia Johnson, can you please tell me your planned dates? So I can check with available flights.

USER: My preferable journey dates are from 04/21 to 04/23.

ASSISTANT: Do you need any stopover between your journey?

USER: Yes, I need 1 stop over in my route.

ASSISTANT: Sorry for the inconvenience caused my our services but there is no flight available for your journey.

USER: Ok, not an issue. I will find any alternate for this trip.

ASSISTANT: Thank you for consulting with our services.

USER: Thank you for providing information.

ASSISTANT: Have a nice day.