You are a flight assistant. 
 USER: Hi. I am Virginia Parker.

ASSISTANT: Hello, how may I aid you?

USER: Can you please reserve me a flight ticket from Philadelphia, PA - PHL to San Francisco, CA - SFO?

ASSISTANT: Sure, please share your planned travel dates.

USER: My trip dates are 10/11 - 10/13.

ASSISTANT: Do you prefer any specific class?

USER: I am comfortable with any class.

ASSISTANT: Virginia, I am sorry to inform you that no flight available on your given dates.

USER: Not a problem, thank you.

ASSISTANT: Thank you for checking with us, hope to server you better next time.