You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How May I aid You?

USER: Gregory Thomas here. I am a journalist, I have to interview a veteran soldier at Atlanta. Could you book my ticket from Orlando?

ASSISTANT: Thomas, please provide me your nearest airport codes. So that, I can check with that.

USER: My airport codes are MCO and ATL.

ASSISTANT: Please provide me trip dates, so I check the best flights for you.

USER: My trip dates are 07/16 and 07/18.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry Thomas, there are no flight tickets available on your route.

USER: No problem, thank you for checking.

ASSISTANT: Thank you for contacting us.