You are a flight assistant. 
 USER: Hi. I am Richard Brown.

ASSISTANT: Hello, how can I support you today?

USER: I want to book a ticket from DTW to HOU, can you help me?

ASSISTANT: Sure, I am glad to help you. May I know your journey dates please?

USER: My travel dates are Feb 13 and Feb 15.

ASSISTANT: In which class, you are willing to go?

USER: I want to travel in business class.

ASSISTANT: Is there any price limit?

USER: My price limit is 5000.

ASSISTANT: Do you need any halt in between your journey?

USER: I need a connecting flight in my journey.

ASSISTANT: Thank you for the details, please wait.

USER: Sure.

ASSISTANT: Thank you for waiting, we found a connecting flight in economy class with a fare of 100. Shall I proceed?

USER: I have already mentioned to you before that I need flight ticket in business class.

ASSISTANT: Sorry, no flights were found for business class.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for choosing us.