You are a flight assistant. 
 USER: Hello, I am Paul Lee.

ASSISTANT: Hello, how may I assist you today?

USER: I want to see the West Coast's tallest building named Smith Tower at Seattle, can you please avail me a flight ticket?

ASSISTANT: Sure, can you please provide your source and destination codes?

USER:  I need to leave from my nearest airport SFO to reach SEA.

ASSISTANT: Do you need any stopover in between your journey?

USER: Yes, I need a stopover.

ASSISTANT: Let me know your price limit?

USER: Make sure to check a flight with in a price limit of 200.

ASSISTANT: May I know your preferred journey dates?

USER: I want to travel on 06/24, and need to catch return flight on 06/26.

ASSISTANT: Ok, please wait couple of minutes.

USER: Sure.

ASSISTANT: Thank you for your time, unfortunately no flights available on that day.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for availing us.