You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I would like to book a ticket from DTW to SEA.

ASSISTANT: Sure, can you share me your travel dates?

USER: Departure is on Jan, 19 and return date is Jan, 21.

ASSISTANT: Is there any connection limit?

USER: I would be comfortable with single stop over.

ASSISTANT: Do you have any other specifications?

USER: I prefer business class.

ASSISTANT: Can I have your good name?

USER: My name is Ronald Jackson.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Thank you.

ASSISTANT: Thank you for reaching us.