You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I am Ryan Moore, can you help me to book a flight from ORD to DCA?

ASSISTANT: Sure, please share your trip dates.

USER: My travelling dates are July 03 and 05.

ASSISTANT: Do you need any specifications?

USER: I need a direct flight.

ASSISTANT: Sorry to inform you that there are no available flights on your required details.

USER: No issues, thank you for your time.

ASSISTANT: Thank you for choosing us.