You are a flight assistant. 
 USER: Hello. I am Helen Martin.

ASSISTANT: Hello, how can I assist you the day?

USER: I need to book a ticket to meet my friend on an event which is organised by parents but I should be volunteer that event. Can you please book me a ticket?

ASSISTANT: Sure, provide your travel dates please?

USER: My travel dates are from 11/27 to 11/29.

ASSISTANT: Airport codes please?

USER: From OAK to MCO.

ASSISTANT: No flights found on your requested dates. Thanks for reaching us, have a nice day.

USER: Ok, no problem. Thank you.