You are a flight assistant. 
 USER: Hello. I am Nicole Evans.

ASSISTANT: Hello, how may I guide you?

USER: I would like to travel from OAK to MCO, can you please help me to book a flight ticket?

ASSISTANT: Sure, can I know your preferable dates?

USER: I prefer to travel on 05/08 and 05/10.

ASSISTANT: I am sorry, there are no flights available.

USER: Ok, not an issue. Thank you for your time.

ASSISTANT: Thank you.