You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you now?

USER: I want to book a ticket from JFK to DTW. Could you book a ticket?

ASSISTANT: Sure, I am happy to help you with that. Can I have your travel dates please?

USER: Trip dates are from July, 22 till July, 24.

ASSISTANT: Are you looking for any specific class to travel?

USER: I am comfortable with any class preference.

ASSISTANT: Do you have any particular timings to travel?

USER: Return time should be afternoon.

ASSISTANT: Sorry to inform you that no flight is available to you on your dates.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: My name is Dennis Miller.

ASSISTANT: Thank you for choosing us, have a good day.