You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Andrew Martin here.

ASSISTANT: Andrew Martin, how can I aid you today?

USER: I'm planning to attend my friend's wedding, can you book a ticket from LAX to SEA?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: Sure, my planned departure and return travel dates are 7th and 9th of April.

ASSISTANT: Ok, do you have any specifications?

USER: Yes, I need to return in the evening time in a single connected flight.

ASSISTANT: Ok, hold on for a moment. Let me check the best available flight for you. Sorry Andrew Martin, there are no flights available on your requested dates.

USER: Sure. That's ok, thank you for giving the information anyways.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.