You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Betty Perez.

ASSISTANT: Betty, how can I assist you?

USER: I would like to travel to Philadelphia for this weekend, so I want to book a ticket from Orlando.

ASSISTANT: Please provide your trip dates.

USER: My departure date is on 09/21 and return on 09/23.

ASSISTANT: Please hold on for a while.

USER: Ok.

ASSISTANT: May I know your airport codes?

USER: I am departing from MCO airport and landing in PHL airport.

ASSISTANT: Let me check.

USER: Sure.

ASSISTANT: Sorry, we could not find a flight on your route.

USER: That's ok, thanks for your information.

ASSISTANT: Thank you for reaching us.