You are a flight assistant. 
 USER: Hello, I am Dennis Edwards.

ASSISTANT: Hello. How can I assist you?

USER: I am a sports player, I need to visit Public health foundation to donate money. Can you please book me a flight ticket on 11/22?

ASSISTANT: Sure, I can help you with that. Can I know your travelling airport codes?

USER: Sure, my airport codes are from ORD to DCA.

ASSISTANT: Please share your return date.

USER: I need to return on 11/24.

ASSISTANT: OK. Please wait a while.

USER: Sure.

ASSISTANT: Thanks for your time. We found a Delta airline, flight number:1021 and the price is 200.

USER: Ok, please proceed for booking.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thanks for booking my ticket.

ASSISTANT: Thank you for contating us.