You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I oblige you today?

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

ASSISTANT: Sure, we are euphoric to help you.

USER: Thank you.

ASSISTANT: On which dates you are planning to make your journey?

USER: My journey dates are 10/19 and 10/21.

ASSISTANT: Can you please let me know your take off airport code?

USER: My take off airport code is GA-ATL.

ASSISTANT: May I know your name please?

USER: Dorothy Edwards here.

ASSISTANT: Thank you for your details, please be on hold.

USER: Sure.

ASSISTANT: Sorry to notify that, we did not find any flights matching your journey dates.

USER: No problem. Thank you.

ASSISTANT: Thank you for opting us.