You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you today?

USER: Can you please help me to book a flight from OAK to ATL?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: May I know your connection preference?

USER: I prefer to travel with maximum one connecting flight.

ASSISTANT: Ok, on what dates are you planning to travel?

USER: I will depart on May 27th and will be returning back on May 29th.

ASSISTANT: Please give me a moment to check the availability of flights.

USER: Sure.

ASSISTANT: Thank you for waiting, we are sorry to inform you that there is no flight available on your route.

USER: No problem, thank you for the information.

ASSISTANT: May I know your name please?

USER: My name is Anthony Young.

ASSISTANT: Thank you for reaching us.