You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Can you help me to book a flight ticket from LGA to OAK?

ASSISTANT: Sure, I will help you with this. Please help me with your planned travelling dates.

USER: My travelling dates are 12 and 14 of Jan.

ASSISTANT: Please help me with your name.

USER: I am Emma Mitchell.

ASSISTANT: Do you need a break in your journey?

USER: I need a connecting flight.

ASSISTANT: Do you have any other preferences in your journey?

USER: I prefer to travel in business class and return in the afternoon.

ASSISTANT: Please allow me a minute.

USER: Sure.

ASSISTANT: Emma Mitchell, I am really sorry to inform you that there are no flights available for your journey.

USER: Oh! that very sad to hear, thank you.

ASSISTANT: I have rechecked twice to book a ticket for you. But I couldn't help you out. I highly regret for the inconvenience caused to you. Thank you for reaching us. Have a great time.