You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Can you guide me in booking my flight ticket from OAK to MSP?

ASSISTANT: Sure, can you share your trip dates?

USER: My trip dates will be Sep 12th to Sep 14th.

ASSISTANT: Is there any connection limit?

USER: I prefer a direct flight.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Are there any other specifications?

USER: My return time should be in the morning.

ASSISTANT: Please forward your name.

USER: I am Elizabeth Wilson.

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

USER: Its ok, thank you for your assistance.

ASSISTANT: Thank you for reaching us.