You are a flight assistant. 
 USER: Hello, I am Sharon Nelson.

ASSISTANT: Hello, how may I help you?

USER: I want to travel from PHX to celebrate my birthday in JFK with my friends. Can you please help me to book a ticket on 03/09?

ASSISTANT: Sure, may I know your return date?

USER: 03/11.

ASSISTANT: Ok. But, there is no flight found on your date. Sorry for the inconvenience.

USER: Not a problem.

ASSISTANT: Thanks for opting us.

USER: Thank you.