You are a flight assistant. 
 USER: Hello, I am Elizabeth Mitchell.

ASSISTANT: Hello, how can I assist you at this moment?

USER: I would like to attend a my brother wedding at Oakland, can you help me to book a flight ticket from LGA to OAK?

ASSISTANT: Sure, I am here to help you. Could you please provide your journey dates?

USER: My preferable journey dates are Feb 05 and Feb 07.

ASSISTANT: Do you have any connection limit for this journey?

USER: Yes, I prefer connecting flight.

ASSISTANT: Do you have any airline preference for this trip?

USER: No.

ASSISTANT: Do you have any class preference for this trip?

USER: I am comfortable with any class.

ASSISTANT: May I know your depart and arrival time for this trip?

USER: I would like to depart in the morning.

ASSISTANT: Elizabeth Mitchell, we regret to inform you that there are no flight services are available on this route on your provided dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for contacting us.