You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am planning to visit Lake Merritt at Oakland, could you please help me with booking a flight ticket from SEA to OAK?

ASSISTANT: Let me know your travelling dates.

USER: I would like to depart on Sept 1st and return on Sept 3rd.

ASSISTANT: Do you have any preference?

USER: I need a connecting flight in business class.

ASSISTANT: Can I know your name?

USER: I am Ruth Collins.

ASSISTANT: Sorry, no flights found for your travelling dates.

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you.