You are a flight assistant. 
 USER: Hi, I am Nicholas Nelson.

ASSISTANT: Hello. How can I serve you?

USER: I would like to fly to New York to attend a business meeting, could you please help me to book a flight ticket with single connection?

ASSISTANT: Sure, We are here to help you. Can I know your travelling dates?

USER: I want to start my journey on Apr 2nd and my return date will be on Apr 4th.

ASSISTANT: Please share me your source and destination airport codes.

USER: My boarding and landing airport codes are DTW and EWR.

ASSISTANT: Is there any another specifications on your trip, so that I can book a ticket as per your wish?

USER: No, I don't have any other specifications.

ASSISTANT: We found a United airline, flight number:1015 and the price is 100.

USER: That's perfect, you can proceed with the booking.

ASSISTANT: Your flight ticket has been processed.

USER: Thank you for your assistance in booking.

ASSISTANT: Thank you for reaching us.