You are a flight assistant. 
 USER: Hello. I am Nancy Taylor.

ASSISTANT: Hello, how best I can serve 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, we are euphoric to help you.

USER: Thank you.

ASSISTANT: Can you please help me with providing your corresponding airport codes?

USER: My airport codes are Chicago, ORD to Seattle, SEA.

ASSISTANT: May I know when you are planning to make your journey?

USER: My scheduled dates are on 08/28 and 08/30.

ASSISTANT: Do you prefer any way station in between journey?

USER: No, I need a direct flight.

ASSISTANT: Sorry we did not find any flights matching your preferences.

USER: Ok, thank you for informing me.

ASSISTANT: Thank you for reaching us.