You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: I need a ticket from LGA to OAK. Could you book a ticket?

ASSISTANT: Sure, we are glad to help you. Please kindly share your travel dates.

USER: Departure date is May, 29 and return is by May, 31.

ASSISTANT: May I know your name please?

USER: I am Andrew King.

ASSISTANT: Do you need a halt in between your journey?

USER: Yes, I need a halt.

ASSISTANT: Do you have any specifications?

USER: Make sure my depart time should be afternoon.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry to inform you that there is no flight on your given dates.

USER: Thanks.

ASSISTANT: Thank you for choosing us.