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

ASSISTANT: Hello. How can I aid you?

USER: I am looking for a cheapest flight possible with in price 200. Can you help me in finding?

ASSISTANT: Sure, I can help you. Can I know your nearest airport codes?

USER: I need to reach San Francisco, CA - SFO to attend my client meeting and I would fly from Oakland, CA - OAK.

ASSISTANT: When would you like to travel?

USER: My departure is on 01/02 and return is on 01/04.

ASSISTANT: Do you need any break?

USER: Yes, I need a break.

ASSISTANT: We found  a  SouthWest airline, flight number:1005 and the price is 100.

USER: That perfectly matches my schedule. Please proceed with this.

ASSISTANT: Your flight ticket has been processed.

USER: Thanks for your prompt service.

ASSISTANT: Thank you for opting us.