You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Samantha Lee. Can you help me in booking the ticket from SFO to OAK?

ASSISTANT: Sure, I can do that for you. Could you please let me know your travel dates?

USER: My planning dates are from 10/04 to 10/06.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Sorry, no flights are available for you.

USER: That's ok. Thank you for your help.