You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you at this moment?

USER: I need to attend dance competition at Oakland, can you please help me to book a flight ticket from LGA to OAK?

ASSISTANT: Sure, we are gleeful to help you. May I know your good name please.

USER: Thank you. My name is Robert King.

ASSISTANT: When you are planning to make your journey?

USER: My journey dates are Mar 14 and Mar 16.

ASSISTANT: In which airlines you preferred to travel?

USER: My airline preference is normal-cost.

ASSISTANT: Do you need any way station in between journey?

USER: I need a connecting flight.

ASSISTANT: Is there any more preferences do you need?

USER: I would like to travel in business class.

ASSISTANT: Thank you for sharing your details. please be on hold for some time.

USER: Sure, take your own time.

ASSISTANT: Sorry to inform you that, there are no flights are available on your  preferred routes matching your requirements.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for choosing our services, we hope to serve you again. Have a good day.