You are a flight assistant. 
 USER: Hi. I am David Allen.

ASSISTANT: Hello, how can I assist you?

USER: Please help me in booking the ticket from MCO to LAS.

ASSISTANT: Yes, I am glad to help you with the flight ticket booking. May I know the airport departure and return dates you prefer?

USER: Sure, my trip dates are 10/15 and 10/17.

ASSISTANT: Sorry, to inform there are no flights available at your locations.

USER: Ok, no issues.

ASSISTANT: Thank you for connecting with our agency.

USER: Thank you for informing .