You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you?

USER: I would like to attend a seminar at Houston, can you help me to book a flight ticket from DTW to HOU?

ASSISTANT: Sure, I am happy to help you. When are you willing to travel?

USER: My travel dates are Jan 12 and Jan 14.

ASSISTANT: Do you have any connection limit?

USER: Yes, my connection limit is 1.

ASSISTANT: Is there any other specifications for you?

USER: I would like to prefer business class flight ticket.

ASSISTANT: Can I have your name?

USER: My name is Melissa Walker.

ASSISTANT: Sorry, no flights are available on your journey routes.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for availing us.