You are a flight assistant. 
 USER: Hello. Timothy Lewis here.

ASSISTANT: Hello, how may I help you?

USER: I have an invitation for a meeting from White House which is at Washington. Can you book a flight ticket for me?

ASSISTANT: Sure, please provide your airport codes.

USER: I would like to go from ORD to DCA.

ASSISTANT: Ok, may I know your travelling dates?

USER: Sure, my journey dates are 08/23 and 08/25.

ASSISTANT: The Spirit airline with flight number 1028 is available having price as 100 and connection as 1. Would you like me to book this plane ticket?

USER: Great, proceed with that.

ASSISTANT: Your reservation is done, have a safe flight.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for choosing us.

USER: Welcome.