You are a flight assistant. 
 USER: Hi, Anna Lopez here.

ASSISTANT: Hello, how may I aid you?

USER: I have planned to visit Park Hyatt Hotel for get together party with my colleagues on 11/17. Can you help me to book a flight ticket to Washington, DC - DCA?

ASSISTANT: Sure, can you please provide your origin code?

USER: Sure, My origin is Minneapolis & St. Paul, MN - MSP. And my return date is 11/19.

ASSISTANT: Ok, please wait for a couple of minutes.

USER: Sure.

ASSISTANT: Unfortunately, there were no flights found on your dates.

USER: Ok, no issue. Thanks for your service.

ASSISTANT: Thank you for availing us, have a great day.