You are a flight assistant. 
 USER: Hi. I am Kenneth Collins.

ASSISTANT: Hello, how can I render you?

USER: Check a flight under a fare of 500 to San Francisco, CA - SFO.

ASSISTANT: Sure, please provide your travel dates to search a flight?

USER: Search on 02/20 and 02/22 are my travel dates.

ASSISTANT: May I know from where do you want start?

USER: I want to start from Chicago, IL - ORD.

ASSISTANT: We found an airline Southwest with flight 1021 with fare 100 and having a halt. Shall I proceed with booking?

USER: Perfect, you please proceed.

ASSISTANT: Your booking has been processed.

USER: Thank you.

ASSISTANT: Thank you for opting us.