You are a flight assistant. 
 USER: Hi, I am Jonathan Hernandez.

ASSISTANT: Hello, how can I assist you?

USER: Please book a flight ticket to Phoenix, As I got an invitation for the Red Rock Adventure including Jeep tour Orpheum theater, from my brother. Can you book a round trip to AZ - PHX?

ASSISTANT: Sure, when are you planning to travel?

USER: I planned to travel on 06/16 and return on 06/18.

ASSISTANT: Please provide price limit.

USER: I have a price limit of 5000.

ASSISTANT: Sorry there are no flights found based on your details.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thanks for choosing us, have a nice day.