You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Dennis Roberts, planning to visit Boston to Enjoy Fun-Filled vacation.Can you help me with it?

ASSISTANT: Sure, I can help you with that. Please provide your travel dates?

USER: My travel dates are 10/10 and 10/12.

ASSISTANT: May I know your source and destinations with codes?

USER: Sure, my source is ATL and destination is BOS.

ASSISTANT: We found 1020 plane in Frontier airline with fare 400 available for you. Shall I confim?

USER: Please do not proceed with booking, my price limit is 200.

ASSISTANT: Sorry, no flights are available with that price range.

USER: Thanks for the help.