You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I support you?

USER: Can you help me to book a flight from DTW to SEA?

ASSISTANT: Sure, when would you like to travel?

USER: My preferred journey dates are June 08 and 10.

ASSISTANT: Do you have any class preferences?

USER: I prefer business class.

ASSISTANT: Let me know your connection limit?

USER: I need a connecting flight.

ASSISTANT: May I know your name please?

USER: My name is Christine Nelson.

ASSISTANT: Sorry, we did not find any flights running in your desired routes.

USER: No issues, thank you for your search.

ASSISTANT: Thank you for reaching us.