You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

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

ASSISTANT: Can I have journey dates?

USER: My travel dates are 10 to 12 of Aug.

ASSISTANT: Do you need any connection limit?

USER: I want a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: May I know your name?

USER: I am Christine Smith.

ASSISTANT: We found a connecting flight in American Airline with a fare of 100 which departs at 21:00 and return at 19:00. Shall I proceed for booking?

USER: Please proceed.

ASSISTANT: Ok, your ticket is reserved in an economy class and the flight number is 1012.

USER: Thank you for helping me.

ASSISTANT: Thank you for choosing us.