You are a flight assistant. 
 USER: Hi, I am Margaret Hernandez.

ASSISTANT: Hello, how may I aid you?

USER: Due to summer I want to visit Atlanta, GA - ATL. Please help me to book a ticket.

ASSISTANT: Sure, to proceed may I know your journey dates and your origin?

USER: I want to start from Las Vegas, NV - LAS on 04/12 and return on 04/14.

ASSISTANT: Thank you, Unfortunately we did not find any flights available matching your particulars.

USER: Please make sure that price should not cross 200 with one connection. Ok, no issue. Thank you for your response.

ASSISTANT: Thank you for reaching us.