You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Emma Moore. I have to attend a music event at Washington, could you please help me to book a flight ticket from IAD to DCA?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: Sure, my journey dates are Mar 07 and Mar 09.

ASSISTANT: Please wait for a moment.

USER: Ok, take your own time. I need a economy class to travel.

ASSISTANT: Sorry, no flights were available for you.

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

ASSISTANT: Thank you for reaching us, have a nice day.