You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you?

USER: I am Elizabeth Rodriguez. I am planning to visit Pier 39 at San Francisco, CA-SFO. So can you please help me to book a flight ticket within fare of 200?

ASSISTANT: Sure, may I know where are you heading from?

USER: My heading point is Austin, TX-AUS.

ASSISTANT: Please let me know your journey dates.

USER: My journey dates are from 07/05 to 07/07.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: There is an Delta airline with flight number 1000 and price of 100 available for you on your requested dates. Shall I proceed for booking? Your booking has been done. Thank you for choosing us.