You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Benjamin Martin.

ASSISTANT: How can I assist you at this moment?

USER: Can you book a flight ticket for me from PHX to EWR?

ASSISTANT: Sure, I am happy to help you with that.

USER: Thank you.

ASSISTANT: Can I have your travel dates please?

USER: I am planning my dates on 11/23 and back on 11/25.

ASSISTANT: Ok, please be hold on for a moment.

USER: Sure.

ASSISTANT: Sorry Benjamin Martin., no flight is available to you on your dates.

USER: Ok, that's fine. I can reach other agencies to book my ticket, thank you for your help.

ASSISTANT: My pleasure. Thank you for choosing us, have a great day.