You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Williams Anderson here.

ASSISTANT: Anderson, how may I guide you?

USER: I want to book my flight ticket from PHX to LAX, can you please help me.

ASSISTANT: Anderson, could you please share me your journey dates?

USER: Sure, I would like to start my journey on 01/03 to 01/05.

ASSISTANT: Please wait for a while.

USER: Sure, I will wait for your response.

ASSISTANT: Anderson, sorry there are no flights available on your preferred dates.

USER: Its ok, no problem.

ASSISTANT: Thank you very much for approaching us.

USER: Thank you for your help.