You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Stephen Allen, want to travel from HOU to PHX.

ASSISTANT: On which dates you are willing to travel?

USER: My travelling dates are fro 09/19 to 09/21. Please make sure, I want a direct connection.

ASSISTANT: There is no flight available.

USER: It's ok, thank you.

ASSISTANT: Welcome.