You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

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

ASSISTANT: Sure, let me know your travelling dates.

USER: Trip dates are from June, 16 till June, 18.

ASSISTANT: Can you please share your connection limit?

USER: I need connecting flight.

ASSISTANT: Do you have any class preference?

USER: I prefer business class.

ASSISTANT: Do you have any other requirements?

USER: I would like to depart in the afternoon.

ASSISTANT: May I know your name please?

USER: My name is Andrew Nelson.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: Thank you.

ASSISTANT: Thank you for opting us.