You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: I need to book a ticket from LAX to LGA. Could you book a ticket?

ASSISTANT: Sure, can you share your trip dates?

USER: Departure is June, 27 and return date is June, 29.

ASSISTANT: Do you have any preferences?

USER: I prefer business class ticket.

ASSISTANT: May I know your name?

USER: My name is Deborah Adams.

ASSISTANT: Sorry, there is no flight on your given preferences.

USER: Thank you.

ASSISTANT: Thank you for opting us.