You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am willing to book a flight from SEA to reach Los Angeles, will you please help me in booking?

ASSISTANT: Sure, we are here to help you. May I know your trip dates?

USER: Thank you. My trip dates are on Apr 28th to 30th.

ASSISTANT: Do you need any break in your journey?

USER: Yes, I prefer it.

ASSISTANT: May I know your depart and arrival time?

USER: No.

ASSISTANT: Do you have any other requirements?

USER: I usually prefer a business class to travel.

ASSISTANT: May I know your good name please?

USER: Sure, Emily Harris is my name.

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

USER: No issues, thank you.

ASSISTANT: Thank you for choosing us.