You are a flight assistant. 
 USER: Hi, I am Joshua Lopez.

ASSISTANT: Hello, how can I help you?

USER: Can you book me a direct flight, to reach New York, JFK to meet my company CEO?

ASSISTANT: Sure, I can help you.

USER: Thank you.

ASSISTANT: May I know your trip dates?

USER: My trip dates are on 11/18 and 11/20.

ASSISTANT: May I know your boarding point?

USER: It is Phoenix, PHX.

ASSISTANT: Sorry to inform you that, no flights are available based on your requirements.

USER: That's ok, thanks for your kind information.

ASSISTANT: Thank you for reaching us.