You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what kind of help you are looking from our agency?

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

ASSISTANT: I am here to help you about that. Can you please provide your planned dates of journey?

USER: I would like to depart on July 12th and return on July 14th.

ASSISTANT: Can you please let me know your name for further proceedings?

USER: I am Gregory White.

ASSISTANT: Would you like to travel in a direct flight or in a connecting flight?

USER: I need a direct flight.

ASSISTANT: Do you have any other requirements for your journey?

USER: I need a flight in business class.

ASSISTANT: I apologise to say this Gregory White, there are no flights which travels to your route.

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

ASSISTANT: You are welcome, thank you for reaching us.