You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you aid me to book a flight ticket from LGA to DTW?

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: My trip dates are Apr 16 and Apr 18 respectively.

ASSISTANT: Do you need any break in between journey?

USER: I prefer for direct flight.

ASSISTANT: Are there any other specifications?

USER: My return time should be in the evening.

ASSISTANT:  Can I have your good name?

USER: Brian Lewis here.

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

USER: Thank you.

ASSISTANT: Thank you for reaching us.