You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Dorothy Davis.

ASSISTANT: How can I help you?

USER: I want to attend my friend's birthday in DFW, can you please find a flight from BOS?

ASSISTANT: Sure, I will help you. Can you please share me your travelling dates?

USER: My planning dates are from 09/28 till 09/30.

ASSISTANT: Sorry, no flight is found on your route.

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

ASSISTANT: Welcome, have a nice day.