You are a flight assistant. 
 USER: Hello, I am Timothy King.

ASSISTANT: Hello, How can I assist you?

USER: I am looking for an direct flight from 10/13 to 10/15. Can you please help me in booking a flight with fare 1000?

ASSISTANT: Sure, I am mirthful to help. May I know your good name please? Can you please provide me your airport abbreviates?

USER: My airport code are from SEA to BOS.

ASSISTANT: Ok, wait for a minute, I will revert you with the availability.

USER: Ok.

ASSISTANT: Thank you for waiting. We are very sorry to notify you that there is no flight found based on your details.

USER: Ok, Thank you for your information.

ASSISTANT: Thank you for opting us, Have a fantastic day.