You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I support you today?

USER: Dorothy Hall here. I am a human rights activist, I have to meet foreign delegates to discuss about government policies. Could you help me to book a flight ticket?

ASSISTANT: Sure, we are rapturous to help you. Can you share me your trip dates?

USER: My itinerary dates are Apr 27 and Apr 29.

ASSISTANT: Do you need any lay over in your journey?

USER: I need 1 lay over.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: May I know your airport codes?

USER: My genesis and terminus airport codes are DFW and OAK.

ASSISTANT: There is a connecting flight with fare of 100 and 1022 flight number. Shall I proceed?

USER: Please book my ticket.

ASSISTANT: Your seat has been reserved in economy class with Southwest airline.

USER: Thank you for assisting me.

ASSISTANT: Thank you for reaching us.