You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I need to attend a client meeting, can you please book a ticket from DEN to MCO?

ASSISTANT: Sure, let me know your travel dates please?

USER: Sure, my planned departure and return travel dates are 17th and 19th of June.

ASSISTANT: Ok, is there any class preference?

USER: No, I'm ok with any class.

ASSISTANT: Do you have any time concern?

USER: Yes, I want to return in the afternoon time.

ASSISTANT: Do you need any airline preference?

USER: No, I'm ok with any airlines.

ASSISTANT: Can I know your name please?

USER: Yes, my name is Robert Baker.

ASSISTANT: Sorry to inform you that there are no flight services available on your given dates.

USER: Oh! That's ok, thank you for giving the information anyways.

ASSISTANT: Thanks for contacting us.