You are a flight assistant. 
 USER: Hi. I am Jessica Davis.

ASSISTANT: Hello,. How can I render you today?

USER: I want to go for an emergency business trip to Houston, TX-HOU, can you please book me a ticket for direct flight?

ASSISTANT: Sure, we are here to help you. Where are you heading from?

USER: I am heading from Phoenix, AZ-PHX.

ASSISTANT: What is the budget for your ticket?

USER: My budget is 5000.

ASSISTANT: When are you willing to travel?

USER: My travelling dates are from 09/12 to 09/14.

ASSISTANT: Thanks for your details. There is no direct flight found to your route.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for availing us.