You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I am Brandon Phillips. I want to book a direct flight ticket to attend an emergency case. Can you help me?

ASSISTANT: Sure, I can help you. May I know your trip dates?

USER: 08/10 and 08/12 are my travelling dates.

ASSISTANT: Where you need to catch the flight and land?

USER: DCA and ATL are my nearest airport codes.

ASSISTANT: Sorry to inform you that, no flights are available with your needs.

USER: No issue. Thank you.

ASSISTANT: Thank you for choosing us.