You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: Myself Melissa Perez, can you please help me to book a flight ticket from IL - ORD to DC - DCA?

ASSISTANT: Sure, I am gleeful to help you in booking the flight ticket.

USER: Ok, my travel dates are 11/23 and 11/25 respectively.

ASSISTANT: Thank you for providing your travel dates, please wait for a while. Sorry Perez, there are no flights available for your desired dates.

USER: Ok, not a problem. Thank you for providing the information.

ASSISTANT: Thank you for connecting with us.