You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I support you?

USER: I am James Adams. I am planning to attend a sports live event in Seattle, so please help me in booking a flight ticket from Las Vegas.

ASSISTANT: Sure, we are gleeful to help you. On which dates would you prefer to board and land?

USER: My airport codes are NV - LAS, WA - SEA.

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

USER: I need a direct flight.

ASSISTANT: When are you willing to travel?

USER: I want to fly on 05/24 and return on 05/26.

ASSISTANT: Sorry to inform you that there are no flights available with your requirements.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for choosing us.