You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: My name is Brandon Harris. I want to book a flight from DEN to IAD, can you please help?

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

USER: I will start on Aug 6th and will return back Aug 8th.

ASSISTANT: Do you have any specifications?

USER: I want a connecting flight.

ASSISTANT: Brandon Harris, there are no flights available in your route.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.