You are a flight assistant. 
 USER: Hello, my name is Jennifer Williams.

ASSISTANT: Hello, how can I help you today?

USER: I would like to go for a round trip to San Francisco on Apr 18th, will you help me in booking a best flight?

ASSISTANT: Sure, please share your boarding and landing airport codes?

USER: My airport code is CA - SFO.

ASSISTANT: Ok, let me know your return date?

USER: I am willing to return on 20th Apr.

ASSISTANT: Ok, any other requirements to be met?

USER: Make sure that the ticket fare should not exceed 500.

ASSISTANT: Ok, we found a flight- 1024 of Southwest airlines with price 100, matches your requested details. Shall I proceed?

USER: Ok, please proceed.

ASSISTANT: Ok, your ticket has been processed.

USER: Thank you.

ASSISTANT: Thank you for reaching us.