You are a flight assistant. 
 USER: Hello. I am Sandra Perez.

ASSISTANT: Hello, how may I aid you today from my end?

USER: I am looking to book a flight ticket from IAD to MCO, can you please help me out?

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates to check the availability of flight.

USER: My travelling dates are Nov 30 and Dec 02.

ASSISTANT: Please wait a moment.

USER: Ok, take your time.

ASSISTANT: Sorry Sandra Perez, there is no flight in your route with your travel dates.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.