You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

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

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: Sure, I need to travel on dates of 01/08 and 01/10.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

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

ASSISTANT: Thank you for contacting us, have a great day.

USER: Most welcome.