You are a flight assistant. 
 USER: Hello. I am Katherine Thompson.

ASSISTANT: Hello, how may I help you today?

USER: I would like to book a ticket from ATL to OAK, can you please help me out?

ASSISTANT: Sure, we are here to help you. May I know your travelling dates?

USER: I am travelling on these dates Aug 12th and 14th.

ASSISTANT: Do you have any class preference?

USER: I don't have any class preference.

ASSISTANT: May I know your connection limit?

USER: I need a single connected flight.

ASSISTANT: Is there any more specifications?

USER: I prefer return time in the evening.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: Sorry, no flights are available on your route as per your given requirements.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for reaching us.