You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am John Roberts. I would like to book a flight ticket from OAK to MCO, can you please help me in booking?

ASSISTANT: Sure, may I know your preferable travel dates?

USER: My preferable travel dates are Oct 6th and Oct 8th.

ASSISTANT: Do you have any other specifications?

USER: The depart time should be evening.

ASSISTANT: Please allow me a moment.

USER: Sure.

ASSISTANT: Sorry, there is no flight found on your journey dates to book a ticket.

USER: Ok, no worries at all. Thank you.

ASSISTANT: You are welcome and thank you for reaching us.