You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Frank Wilson. Can you please book a flight ticket from DCA to MCO?

ASSISTANT: Sure, I am here to help you. May I know your travelling dates to proceed further?

USER: Sure, I need to travel on dates of 01/18 and 01/20.

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your time. But please make sure that connection should be 0.

ASSISTANT: Sorry, there are no flights in your route as per your travelling details.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Welcome.