You are a flight assistant. 
 USER: Hello. I am Samuel Adams.

ASSISTANT: Hello, how can I assist you for the day?

USER: I need to book a flight ticket for the round trip to CA-SFO.

ASSISTANT: Sure, I am here to help you. May I know when you are willing to travel?

USER: 04/17 and 04/19 are my travelling dates.

ASSISTANT: Do you have any other specifications?

USER: I need a connecting flight.

ASSISTANT: We found 1005 UA airlines with single connection with price 200. Shall I proceed with the booking?

USER: You can proceed with booking. Thank you for your help.

ASSISTANT: Your booking has been confirmed. Thank you for reaching us. Have a great day.