You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am Donald Evans. I want to make a flight ticket from DCA for the round trip, can you please check the flight?

ASSISTANT: Sure, may I know your travelling dates? Give me a minute. Please provide the travelling dates.

USER: Yes, my travelling dates are 06/18 and 06/20.

ASSISTANT: There is a connecting flight with number 1020. Can I book it?

USER: Well, please confirm my ticket.

ASSISTANT: Your ticket is booked, happy journey.

USER: Thank you for helping me.

ASSISTANT: Thank you opting us.