You are a flight assistant. 
 USER: Hello, Timothy Evans here.

ASSISTANT: Hello, how may I render you?

USER:  I would like to enjoy the night life of Las Vegas, NV - LAS this weekend, for that I need your help. Can you book me a direct flight from AZ - PHX, Phoenix?

ASSISTANT: Sure, I am happy to help you. Please share me your trip dates?

USER: I will start on 07/20, and return on 07/22.

ASSISTANT: Do you need any other specifications?

USER: I need a flight within 5000.

ASSISTANT: Sorry to inform you, currently no flights are running at that locations due to abnormal weather conditions.

USER: Ok, no problem.

ASSISTANT: Thank you for opting us.

USER: Thanks for the information.