You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: My name is Jerry Hill, I want to book a flight on Nov 5 to meet my brother at San Francisco. Can you book a flight with in fare of 1000?

ASSISTANT: Sure, can you share your travelling airport codes?

USER: I will fly from DTW to SFO.

ASSISTANT: May I know your another journey date?

USER: I will return on Nov 7.

ASSISTANT: Do you have any class preferences?

USER: No.

ASSISTANT: Sorry, there is no flight on your given dates.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for opting us.