You are a flight assistant. 
 USER: Hello, my name is Joshua Collins.

ASSISTANT: Hello, how may I help you?

USER: Can you please check whether there are any flights available from DEN to DFW?

ASSISTANT: Sure, on which dates I have to check the flights?

USER: Sure, my travelling dates will be 11/10 and 11/12.

ASSISTANT: There are no flights available on those dates, Collins.

USER: That's ok, thank you.

ASSISTANT: Thank you for choosing us.