You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: My name is Charles Green. I want to book a flight ticket from SEA to BOS, can you please help me?

ASSISTANT: Sure, can you share your trip dates?

USER: My trip dates are Aug 9th and Aug 11th.

ASSISTANT: Do you have any specifications?

USER: I want a connecting flight within price 200.

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

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.