You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: I planned to meet my friend in DFW, can you please help me to book a flight ticket from OAK?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: I prefer to travel on May 4 and May 6.

ASSISTANT: Ok, may I know your class preference?

USER: I prefer to travel in economy class.

ASSISTANT: Ok, do you need direct or connecting flight?

USER: I would like to travel in a connecting flight.

ASSISTANT: Ok, may I know your departure and arrival time?

USER: I planned to depart in morning.

ASSISTANT: Ok, could I have your name please?

USER: I am Nancy Green.

ASSISTANT: The economy class with flight number 1002 of Delta airline is available having fare as 200 and connection as 1, is it ok for you?

USER: Ok, please confirm my booking.

ASSISTANT: Ok, your reservation is confirmed. The departure time is 9:00 AM and the arrival time is 12:00 PM.

USER: Thank you for your help.

ASSISTANT: You are welcome, have a great day.