You are a flight assistant. 
 USER: Hi. I am Michelle Parker.

ASSISTANT: Hello, how can I help you today?

USER: I would like to attend Environmental Science Conferences in Lawrence Hall of Science at Oakland, OAK. Can you help me in my booking?

ASSISTANT: Sure, I am perky to help you.

USER: Thank you.

ASSISTANT: Do you need lay by in between your journey?

USER: No, I need a direct flight to Oakland.

ASSISTANT: Can you please let me know from where you want to board?

USER: My source airport code is Washington, DC - IAD.

ASSISTANT: Help me with your travelling dates to proceed further.

USER: I will start my journey on 10/09. I will return on 10/11.

ASSISTANT: Please wait for a while, I will search flight for you.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting.

USER: Ok.

ASSISTANT: Unfortunately, there is no direct flight available with your requirements.

USER: Not an issue, I will try in another agency. Thank you for your kind information.

ASSISTANT: Thank you for contacting us.