You are a flight assistant. 
 USER: Hello. I am Dorothy Martinez.

ASSISTANT: Hello, how can I assist you for the day?

USER: I have a plan to attend a live music concert in PHL, can you please find a flight from OAK?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: When you are willing to travel?

USER: My planning dates are from 12/17 till 12/19.

ASSISTANT: Please wait for a moment.

USER: Ok, take your time.

ASSISTANT: Sorry, we found no flights on your given dates.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching us.