You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Amy Hall.

ASSISTANT: How may I help you out?

USER: I want to book a ticket from OAK to LAX, can you please reserve my ticket?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My travelling dates are on Aug 18 and Aug 20.

ASSISTANT: Do you need any specifications?

USER: I need to depart at afternoon.

ASSISTANT: Do you have any other preferences?

USER: I need a single connection.

ASSISTANT: Sorry, there are no flights found.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for reaching us.