You are a flight assistant. 
 USER: Hello, I am Karen Adams.

ASSISTANT: Hello, how may I help you?

USER: Can you please book a ticket from EWR to PHX?

ASSISTANT: Noted. Please share your travelling dates.

USER: Sure, I would like to go on 04/20 and return back on 04/22.

ASSISTANT: Please hold on for a while, I will check the availability.

USER: Ok, ensure it is a single connecting flight.

ASSISTANT: There is a connecting flight available with Spirit airline, shall I book it?

USER: Ok, please proceed for further if it costs you below 1000.

ASSISTANT: Your booking is done with flight number 1008. Happy journey.

USER: Thank you for booking.

ASSISTANT: Welcome. Thank you for reaching us, have a nice day.