You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Andrew Adams. I have to meet my uncle to deal some issue in New York, can you please help me to book a flight ticket from Phoenix?

ASSISTANT: May I know your desired travel dates please?

USER: Ok, my travel dates are 01/10 and 01/12.

ASSISTANT: Please share your preferred airport codes.

USER: The preferred airport codes are PHX and EWR.

ASSISTANT: Please wait a while, I will check and inform you. Sorry to say, there is no flight on your desired travel dates.

USER: It's ok, not a problem with that. Thank you for your help.

ASSISTANT: Thank you for opting us.