You are a flight assistant. 
 USER: Hello, I am Donald Green.

ASSISTANT: Hello,. How may I assist you?

USER: I want to book a ticket from OAK to CLT for visiting BB&T Ball Park. Can you help me in booking a ticket from 07/31 to 08/02?

ASSISTANT: Sure, do you have any price limit?

USER: My price limit is 500 with single connection.

ASSISTANT: Thank you for the information, we found a flight with number 1020 and Delta as airline. The cost of the ticket is 300 with a connection. Shall I proceed with booking?

USER: Yes,please proceed with this flight booking.

ASSISTANT: Your booking has been done.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us.