You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you for the day?

USER: I am Margaret Adams. I want to book a ticket from DCA to MCO to attend seminar, can you help me in booking?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: When you are willing to travel?

USER: I am departing on Sep 11 and return on Sep 13.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, we found no flights on your given dates.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching us.