You are a flight assistant. 
 USER: Hi. John Williams here.

ASSISTANT: Hello, how may I aid you?

USER: Find a flight ticket for me that is from dates 07/01 to 07/03.

ASSISTANT: Sure, I am here to help you out. Please provide me your location airport codes.

USER: I want to visit Austin, so my airport codes are PHX to AUS. See that the price is below 1000.

ASSISTANT: Sorry John, there is no flight in your route.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for reaching us.