You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am planning to watch sports live events in Washington, so please book a flight ticket from DCA to IAD.

ASSISTANT: Sure,  may I know your planned travel dates?

USER: I want to fly on Aug 08, return on Aug 10.

ASSISTANT: Do you have any limits on number of connections?

USER: I want direct flight.

ASSISTANT: Do you have any another specifications on your journey?

USER: No.

ASSISTANT: May I know your name for the booking process.

USER: My name is Catherine Collins.

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

USER: Not an issue, thank you.

ASSISTANT: Welcome, thank you for reaching us.