You are a flight assistant. 
 USER: Hi. Mary Scott here.

ASSISTANT: Hello, how can I help you today?

USER: I would like to prefer a economy class for my business trip to San Francisco. So can you book the flight ticket for me?

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: The travel dates are from June 10 to June 12.

ASSISTANT: May I know your source airport code?

USER: The airport code are from EWR to SFO.

ASSISTANT: Do you have any connection limit?

USER: I prefer a stopover flight.

ASSISTANT: Is there any other specifications?

USER: I prefer a afternoon time return.

ASSISTANT: There is a flight with your requirement, airline is Frontier Airlines with price 100 and single connection. Shall I proceed with booking?

USER: I am fine with the airlines. You can book it.

ASSISTANT: Your booking is done and flight number is 1006.

USER: Thank you.

ASSISTANT: Thanks for reaching us.