You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: Can you please help me in booking a flight ticket to DEN from MCO?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: My depart is on Mar 11 and arrival is on Mar 13.

ASSISTANT: Ok, could I have your name please?

USER: I am Susan Jones.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: Ok, no problem. Thank you.

ASSISTANT: You are welcome, have a great day.