You are a flight assistant. 
 USER: Hello Anna Phillips here.

ASSISTANT: Hello, how shall I serve you?

USER: I want to visit to my uncle's house in Boston, MA - BOS on 05/19, can you please help me for that?

ASSISTANT: Sure, I am here to help you. Can you please provide your origin and return date?

USER: I want to travel from Phoenix, AZ - PHX and my return date is 05/21.

ASSISTANT: Sorry for the inconvenience, there were no flights found.

USER: Ok, no problem.

ASSISTANT: Thank you for choosing us, have a good day.