You are a flight assistant. 
 USER: Hello. I am Lisa Collins.

ASSISTANT: Hello, how may I assist you?

USER: Could you please book a flight ticket to Detroit on June 14 and return back on 16th June?

ASSISTANT: Sure, may I know your airport codes please?

USER: I am heading to DTW from IAH.

ASSISTANT: Do you have any specifications?

USER: Yes, I am looking for a flight with 1 connection.

ASSISTANT: I found an economy class ticket in Frontier airlines with low cost of 200 and it is a single connecting flight. Can I book your ticket?

USER: Yes, please book it.

ASSISTANT: Your ticket is booked with flight 1003.

USER: Thank you for your service.

ASSISTANT: You are welcome.