You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: My name is Carolyn White. I would like to travel from SFO to OAK.

ASSISTANT: Ok, please help me with your travel dates to proceed.

USER: My preferable dates are from 03/30 to 04/01.

ASSISTANT: Sorry, no flights are available on your given details.

USER: That's ok. Thank you.

ASSISTANT: Most welcome.