You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: I am planning to travel to SEA, can you help me to book a flight ticket from OAK?

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

USER: My travel dates are in Sept from 8th to 10th.

ASSISTANT: Ok, may I know your name?

USER: Donna Lopez here.

ASSISTANT: Do you have any specification?

USER: I need a direct flight to travel fast. I would like to depart in morning.

ASSISTANT: Please wait a moment.

USER: Sure.

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

USER: That's ok, thank you for checking.

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