You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, How can I serve you?

USER: I am Nancy Phillips. 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, May I know the travel dates?

USER: I want to travel on 08/22, and need to catch return flight on 08/24.

ASSISTANT: Please help me with your journey codes.

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

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

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

ASSISTANT: Thank you for availing us.