You are a flight assistant. 
 USER: HI. I am Donald Miller.

ASSISTANT: Hello, how can I help you?

USER: I want to book a flight ticket to meet my old friend who stay at CA-SFO  its a round trip. Can you help me?

ASSISTANT: Sure, please provide me your travelling dates?

USER: 04/26 and 04/28 are my travelling dates.

ASSISTANT: Thanks for providing your details. We found 1008 Southwest airline with single connection and price of 100. Shall I proceed with booking?

USER: You can reserve it.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your help.