You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Michael Young here. I want to attend a seminar in New York - LGA on Global Warming, can you please check for the flights from Boston - BOS?

ASSISTANT: Sure, may I know your travelling dates?

USER: My journey will start on 10/01 and I will be returning on 10/03.

ASSISTANT: Please wait for a while.

USER: Ok, please check for the flights within the price of 5000.

ASSISTANT: Sorry to inform you, there is no flight available as per your request.

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

ASSISTANT: Most welcome.