You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am planning to go for SEA from BOS, can you please help me out?

ASSISTANT: Sure, can I know your travel dates?

USER: My travelling dates are 04/20 and 04/22.

ASSISTANT: Can I know your name?

USER: Myself Rebecca Wright.

ASSISTANT: Sorry Wright, there is no flight available on your requested dates.

USER: Ok, fine. Thank you for checking.

ASSISTANT: You are welcome.