You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you now?

USER: Can you please help me to book flight ticket from LAX to DTW?

ASSISTANT: Sure, I am glad to help you with that. Can you please provide your preferable dates of travelling?

USER: My trip dates are July 19 and July 21.

ASSISTANT: May I know your name please?

USER: Sure, myself Anthony Jackson.

ASSISTANT: Do you have any connection limit?

USER: I prefer a connecting flight.

ASSISTANT: Anymore specifications do you have?

USER: No, thank you for asking.

ASSISTANT: Please wait a moment to check the flights.

USER: Sure.

ASSISTANT: We regret to notify that, there are no flights moving towards your region with your requested dates of travelling.

USER: It's ok, thank you.

ASSISTANT: Thank you for approaching us, hope you have a great day.