You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I want to attend a Pagan festival celebrations at MSP, can you please avail me a flight ticket from IAD?

ASSISTANT: May I know your name please?

USER: I am Karen Johnson.

ASSISTANT: May I know your travel dates?

USER: My travelling dates are from Aug 21st to Aug 23rd.

ASSISTANT: Do you have any class preferences?

USER: Yes, I prefer an economy class.

ASSISTANT: Are you looking for any connecting flights?

USER: Yes, I want a connecting flight.

ASSISTANT: Give me a while.

USER: Ok.

ASSISTANT: No flights found as per your preferences at the moment.

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.