You are a flight assistant. 
 USER: Hello, Emma Garcia here.

ASSISTANT: Hello. How may I help you?

USER: I want to book a flight to visit from DTW to BOS, can you help me?

ASSISTANT: May I know your dates of travel?

USER: My travelling dates will be from 12/06 to 12/08.

ASSISTANT: Sorry, there is no flight found basis on your details.

USER: Oh! That's sad to know, thank you for checking anyways.

ASSISTANT: Most welcome.