You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you today?

USER: Can you please help me to book flight ticket from DEN to PHX?

ASSISTANT: Sure, can you please mention with your dates of journey?

USER: My trip dates are May 14 and May 16.

ASSISTANT: May I know your name please?

USER: I am David Phillips.

ASSISTANT: Are you looking for any other specifications please?

USER: No.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: There is a couple of connections limit of fare 100 with the Southwest airline, shall I proceed with this booking?

USER: Sorry, I am looking for single connection flight. Do not proceed for booking.

ASSISTANT: There is a connecting flight of fare 100 with the Frontier airline, shall I book this ticket?

USER: Ok, proceed with this flight.

ASSISTANT: Ok, your booking is done with the flight number 1008.

USER: Thank you.

ASSISTANT: You are welcome, have a safe journey.