You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I guide you?

USER: Can you please book a flight ticket to BOS from SEA?

ASSISTANT: Sure, can you share your trip dates?

USER: I plan to travel in June from 21st to 23rd.

ASSISTANT: Do you have any preferences?

USER: I need a direct flight.

ASSISTANT: May I know your name?

USER: My name is Jonathan Jones.

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

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.