You are a flight assistant. 
 USER: Hello, I am Stephen Nelson.

ASSISTANT: Hello. How can I aid you?

USER: I want to visit IAD, can you help me with direct connection of flight?

ASSISTANT: Sure, I will assist you. Can you provide your journey dates?

USER: My depart is on 09/29 and return on 10/01.

ASSISTANT: Please send me your origin point.

USER: My origin is PHX.

ASSISTANT: What is your budget to travel?

USER: My price limit is 500.

ASSISTANT: Thanks for sharing details. But we are sorry to inform you that no direct flight will run on your route.

USER: No problem, thank you.

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