You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me to book a ticket from LGA to LAX?

ASSISTANT: Sure, may I know your planned trip dates?

USER: My travelling dates will be on Nov 9 to Nov 11.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Is there any class preference?

USER: I would prefer economy class.

ASSISTANT: Do you have any other specifications?

USER: I want to depart in the evening.

ASSISTANT: May I know your good name?

USER: Brenda Campbell here.

ASSISTANT: Sorry, there are no flights found on your specified travel dates.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for availing us.