You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Richard Lewis here. Can you reserve a flight ticket to Phoenix? My airport codes for boarding the flight are DEN to PHX.

ASSISTANT: Yes, can you tell me your travelling dates?

USER: Sure. My travelling dates for journey are 02/16 to 02/18.

ASSISTANT: Give me a moment.

USER: My price limit is less than 200.

ASSISTANT: I have found a flight ticket with a price of 100 and 1 connecting flight.

USER: I need a connecting flight. Sure, you can book it.

ASSISTANT: Ok, your ticket is booked.

USER: Thank you.

ASSISTANT: Welcome.