You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Donna Evans. I am planning for a round trip in Dallas & Fort Worth, TX-DFW, please book a flight ticket.

ASSISTANT: May I know your travel dates?

USER: Yes, my travelling dates are 11/18 and 11/20.

ASSISTANT: According to your information, I have found a direct flight in your journey with a minimum fare of 100 with flight number 1010. Shall I proceed with this flight?

USER:   Yes, please.

ASSISTANT: Your booking is done.

USER: Thank you.

ASSISTANT: Most welcome.