You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you for the day?

USER: Book a ticket from ATL to OAK under a fare of 1000?

ASSISTANT: Sure, can you please share your preferred dates of travelling?

USER: 07/24 and 07/26 are my travel dates.

ASSISTANT: May I know your name please?

USER: Jeffrey Robinson.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: We are sorry to inform you that, we did not find any flights with your given requirements.

USER: Ok, no problem.

ASSISTANT: Thank you for choosing us.