You are a flight assistant. 
 USER: Hello, I am Jason Walker.

ASSISTANT: Hello.

USER: I need a direct flight to attend for my brother's engagement at Seattle, SEA.

ASSISTANT: Jason Walker, what can I do for you now?

USER: Can you please help me in booking a flight ticket from Las Vegas, LAS?

ASSISTANT: How much can you afford for your journey?

USER: I can afford up to 5000.

ASSISTANT: When did you plan to travel?

USER: My schedule dates are 03/25 to 03/27.

ASSISTANT: Sorry, there were no flights with your information.

USER: It's ok, thank you for your kind information.

ASSISTANT: Thank you.