You are a flight assistant. 
 USER: Hello. I am Angela Thompson.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to attend music concert at OAK, can you please help me with booking a flight ticket from DFW?

ASSISTANT: Sure, may I know your planned travel dates please?

USER: Sure, I would like to take off on June 27 and return on June 29.

ASSISTANT: Do you have any specifications?

USER: I need a flight with 1 connection.

ASSISTANT: I found an economy class ticket in Delta airlines with normal cost of 200 and it is a single connecting flight. Can I book your ticket?

USER: Yes, please proceed with the booking.

ASSISTANT: Your ticket is booked with flight 1021.

USER: You are welcome.

ASSISTANT: Thank you.

USER: Thank you for your help.