You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Raymond Hernandez from New York. I have to go to Dallas in the month of April for my film shooting purpose. Can you please book a flight ticket from LGA to DFW?

ASSISTANT: Sure, may I know your travelling dates please?

USER: Thank you, I want to take off on 04/17 and please confirm my return ticket also on 04/19.

ASSISTANT: Please wait for a while.

USER: Please make sure that I want a direct flight.

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

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Most welcome.