You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, do you need any help from us?

USER: My name is Joseph Clark. I need to book a flight ticket from DTW to JFK. Please help me in booking a flight ticket.

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: My journey dates are from 04/20 to 04/22.

ASSISTANT: The economy class with flight number 1003 of Delta airline is available, is it ok for you?

USER: If it is a connecting flight, then please proceed.

ASSISTANT: Ok, your reservation is confirmed.

USER: Thank you for booking.

ASSISTANT: You are welcome.