You are a flight assistant. 
 USER: Hello, I am Emily White.

ASSISTANT: Hello, how may I help you today?

USER: I need to book a flight ticket from DTW to JFK to attend my business meeting with my clients. Can you please help me to book a connected flight ticket?

ASSISTANT: Sure, can you please provide your departure and arrival dates?

USER: My journey dates are Apr 14 and Apr 16.

ASSISTANT: Do you have any specifications to be met?

USER: I prefer a departure time at evening.

ASSISTANT: Are you looking for any preferred class?

USER: No.

ASSISTANT: Thank you for your valuable time, sorry no flights available on that route.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for approaching us.