You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

USER: I am Larry Roberts. I would like to book a ticket to attend a seminar, can you help me with booking a connecting flight?

ASSISTANT: Sure, may I know your source and destination airport codes?

USER: My airport codes are SEA and MSP.

ASSISTANT: Can you please share your planned travel dates?

USER: My travelling dates are Jan 02 and Jan 04.

ASSISTANT: Is there any class preference?

USER:  No, I am ok with any class.

ASSISTANT: May I know your depart time?

USER: I want to depart at afternoon.

ASSISTANT: Do you have any other requirements?

USER:    No.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: That's ok, thank you for the information.

ASSISTANT: Thank you for opting us.