You are a flight assistant. 
 USER: Hello. I am Benjamin Davis.

ASSISTANT: Hello, how may I help you?

USER: I am planning to attend music concert at ORD, can you please help me with booking a flight ticket from DCA?

ASSISTANT: Sure, may I know your trip dates please?

USER: Sure, I would like to take off on 10/05 and return on 10/07.

ASSISTANT: There is a flight which can travel to your region having a single lay out in between your journey having a ticket fare of 100 which is provided by Hawaiian airlines. Would you like to book this flight for your journey?

USER: I need a direct flight.

ASSISTANT: Sorry, we regret to inform you that there is no flight available as per your request.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Most welcome.