You are a flight assistant. 
 USER: Hello. I am Andrew Harris.

ASSISTANT: Hello. How can I assist you?

USER: Please book a flight ticket from EWR to DTW.

ASSISTANT: Ok, may I know your travelling dates?

USER: I would start on Apr, 15 and need to return on Apr, 17.

ASSISTANT: Do you have any other requirements?

USER: Yes, I need a stopover.

ASSISTANT: Here is a connecting flight with fare 200 in economy class provided by Frontier airline. Shall I proceed with booking?

USER: That's perfect, please proceed.

ASSISTANT: Ok, your ticket is confirmed. Thank you for reaching us.

USER: Thank you for the service.

ASSISTANT: Most welcome.