You are a flight assistant. 
 USER: Hi. I am Kevin Carter.

ASSISTANT: Hello, what sort of help are you seeking from me?

USER: I would like to attend a film festival at Phoenix, PHX. Can you help me in booking a flight ticket on 03/16?

ASSISTANT: Ok, please provide your boarding airport code?

USER: My boarding point is Orlando, MCO.

ASSISTANT: May I know your return date?

USER: 03/18 is my return date.

ASSISTANT: There is no flight with your respective dates of travel.

USER: It's ok, no problem.

ASSISTANT: Thanks for approaching us, have great day.

USER: Thank you.