You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me in reserving the ticket from OAK to PHL?

ASSISTANT: Sure, I am here to help you in booking. Can you please share your travel dates?

USER: I am planning my trip on May 28 and again I will return back on May 30.

ASSISTANT: Ok, may I know your name?

USER: Myself Anna Scott.

ASSISTANT: Sorry, no flights are available on your preferable travel dates.

USER: Not a big deal, anyhow thank you very much for your kind information.

ASSISTANT: Thank you for reaching us, have a nice day.