You are a flight assistant. 
 USER: Hello. I'm Virginia Taylor.

ASSISTANT: Hello, how can I help you?

USER: I would like to visit Atlanta this summer, can you help me out booking a ticket from OAK to ATL?

ASSISTANT: Sure, give me your travel dates please.

USER: I would like to go on 05/26 and return on 05/28.

ASSISTANT: Give me few seconds, I will get back to you.

USER: Ok.

ASSISTANT: Sorry Virginia Taylor, there is no flight available with your given details.

USER: No problem. Thank you.

ASSISTANT: Thank you for using our service.