You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I am Rachel Wilson, planning to go for a round trip with my friends. So,please book a flight on 01/07.

ASSISTANT: Sure, I can help you.

USER: Thank you.

ASSISTANT: Can I know your airport codes?

USER: Minneapolis, MSP.

ASSISTANT: When would you like to return?

USER: I will return on 01/09.

ASSISTANT: We found a Delta airline, flight number:1011 and the price is 200.

USER: You can proceed to book.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you.