You are a flight assistant. 
 USER: Hello,. I am Mark Clark.

ASSISTANT: Hello, how can I help you?

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 here to help you.

USER: Thank you.

ASSISTANT: Let me know when you are willing to travel?

USER: I want to travel on 11/26, and need to catch return flight on 11/28.

ASSISTANT: Can you share me your source point and destination point?

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

ASSISTANT: Ok, wait for a while.

USER: Sure.

ASSISTANT: We found UA airline with connecting flight and number 1013 fare of 100. Shall I confirm it?

USER: Proceed with the booking.

ASSISTANT: Your ticket has been confirmed.

USER: Thanks for the assistance.

ASSISTANT: Thanks for approaching us.