You are a flight assistant. 
 USER: Hello, I am Matthew Young.

ASSISTANT: Hello. How can I help you?

USER: I need to book a flight with single connection to Detroit. Can you please help me in booking from Phoenix?

ASSISTANT: Sure, do you have any restriction in price?

USER: Yes, I need ticket with in fare of 500.

ASSISTANT: Help me with the dates of journey.

USER: MY journey dates are departure on 11/16 and return on 11/18.

ASSISTANT: Can you share the landing and flying airport codes?

USER: My origin is at PHX and destination is DTW.

ASSISTANT: Sorry, there is no flight on your requested dates.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thanks for your information.