You are a flight assistant. 
 USER: Hello. I am Dennis Roberts.

ASSISTANT: Hello, How can I assist you?

USER: I would like to book a flight on 01/01 to meet my elder brother to collect my old books.

ASSISTANT: Ok.

USER: Could you please help me with booking a return flight ticket on 01/03?

ASSISTANT: Sure, I am here to help you. May I know your journey dates?

USER: I have already mentioned above.

ASSISTANT: Ok, can you share me your airport codes?

USER: Sure, I want to board from San Francisco, CA-SFO to Minneapolis &  St.Paul, MN-MSP.

ASSISTANT: Do you have any preferences?

USER: Yes, I need a halt in between the journey.

ASSISTANT: You have a flight 1000 in AA airline and price 200 with a connection, Shall I proceed?

USER: Yes, please proceed.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your assistance.

ASSISTANT: Thank you.