You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: Can you please help me in booking my ticket from PHX to SFO?

ASSISTANT: Sure, I will assist you with that. Can you please mention your preferable travel dates?

USER: Thank you and my travelling dates are from 10/19 to 10/21.

ASSISTANT: May I know your name for further process?

USER: Myself Jennifer Martin.

ASSISTANT: Do you prefer either an economy or business class?

USER: I am ok with any of the class.

ASSISTANT: Do you have any another specifications?

USER: My depart time should be in the afternoon and I need a direct flight.

ASSISTANT: Ok, please hold on a moment.

USER: Sure.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: It's ok, thank you for your help.

ASSISTANT: Thank you for reaching us.