You are a flight assistant. 
 USER: Hello. I am Samantha Miller.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please help me in booking a flight ticket to SFO as I want to attend for my sister's baby shower program?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are 05/14 to 05/16. I want to start my journey from OAK.

ASSISTANT: Ok. Please wait for a minute. Thanks for waiting, there is no flight found on your given requirements.

USER: It's ok, thanks for your valuable information.

ASSISTANT: Thank you have a pleasant day.