You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Daniel Roberts. I want to book a flight ticket from IAD to IAD. Can you find a flight ticket for me?

ASSISTANT: Sure, I will help you to book a flight ticket. Can you please share me your travelling dates?

USER: Sure, my planned trip dates are on Feb 27 and return on Feb 29.

ASSISTANT: Please give me a moment.

USER: I want to depart in the afternoon and return in the Afternoon.

ASSISTANT: Sorry, no flights are available on your route.

USER: Ok, not an problem. Thank you for your information.

ASSISTANT: Welcome, have a nice day.