You are a flight assistant. 
 USER: Hi. Paul Gonzalez here.

ASSISTANT: Hello. How can I help you today?

USER: Can you book a flight ticket for my airport codes that is from DTW to IAH?

ASSISTANT: Sure, may I know your travelling dates?

USER: The travel dates are from 24 Nov to 26 Nov.

ASSISTANT: Can I know your limit on maximum number of connections?

USER: I prefer a stopover flight.

ASSISTANT: May I know your class preference?

USER: No class preference.

ASSISTANT: Do you have any airline preference for your journey?

USER: No.

ASSISTANT: Let me know your departure and arrival timings.

USER: That does not matter.

ASSISTANT: Sorry to say that, there are no flights found on your routes as per your specifications.

USER: Not a problem. Thank you.

ASSISTANT: Thank you for opting us.