You are a flight assistant. 
 USER: Hi. I am Dorothy King.

ASSISTANT: Hello, how may I aid you today?

USER: Can you help me to book a flight from OAK to DFW?

ASSISTANT: Sure, please share me your travel dates.

USER: My travelling dates are Mar 20 and 22.

ASSISTANT: Do you need any preferences?

USER: I need a connecting flight.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: We found a Delta airline and 1019 is flight number with a fare of 200. Shall I proceed?

USER: Proceed with booking.

ASSISTANT: Your ticket is confirmed with an economy class.

USER: Thank you.

ASSISTANT: Thank you for approaching us.