You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me in booking a flight ticket from OAK to EWR?

ASSISTANT: Sure, may I know your name?

USER: I am Angela Parker.

ASSISTANT: Can I know your travelling dates?

USER: My travelling dates are from Oct 4th to Oct 6th.

ASSISTANT: May I know your other preferences?

USER: I want to return in the evening. I want a direct flight to travel.

ASSISTANT: Ok, wait a minute.

USER: Ok.

ASSISTANT: Sorry, there are no flights available on your travelling dates.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for choosing us.