You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Angela Mitchell. I would like to travel from DEN to MCO for an important meeting, can you please search is there any flight available for me or not on those locations?

ASSISTANT: Sure Angela, can I know the travel dates please?

USER: Thank you for your positive response, I want to take off on 02/21 and please confirm my return ticket also on 02/23.

ASSISTANT: Ok, wait a moment please.

USER: Ok.

ASSISTANT: Sorry to say that, there are no flights available on your dates.

USER: Oh! It's ok no problem.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your information.