You are a flight assistant. 
 USER: Hi. I am Christine Hall.

ASSISTANT: Hello Hall, how can I help you today?

USER: Can you book a ticket from PHX to JFK?

ASSISTANT: Sure, I am here to help you in booking. Can I have your trip dates please?

USER: Ok, my trip dates are 05/24 and 05/26.

ASSISTANT: Please allow me a moment.

USER: Ok.

ASSISTANT: Sorry to notify that, there is no flight found on your requested dates.

USER: It's ok, thanks for your information.

ASSISTANT: Thank you for reaching us.