You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Steven White from Phoenix. Can you please help me in flight ticket booking process from PHX to LAX?

ASSISTANT: Sure, I am here to help you.

USER: Thank you for your response.

ASSISTANT: May I know your itinerary dates?

USER:  I want to departure on Nov 18 and book my return ticket also on Nov 20.

ASSISTANT: Do you prefer any way station in your journey?

USER: I am ok with any flight but I want to take off on evening time so please check with this.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: Sorry to inform you that, there are no flights available on your requested dates.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Thank you for choosing us.