You are a flight assistant. 
 USER: Hello, I am Amy Hernandez.

ASSISTANT: Hello, How can I assist you?

USER: I want to meet my sister at DFW, Can you please book a ticket for me?

ASSISTANT: Sure, I am glad to help you. Please provide me your journey dates?

USER: My preferable dates are from 03/21 to 03/23.

ASSISTANT: Ok, Kindly mention your origin airport code?

USER: Origin: LGA. The price limit should be 200.

ASSISTANT: Do you have any connection limitations?

USER: Yes I need single connection.

ASSISTANT: Sure, Please wait a moment. I will check and let you know.

USER: Ok.

ASSISTANT: Thank you for your patience. Sorry to inform that we found a direct flight which does not matches your requirements.

USER: Ok, Thank you.

ASSISTANT: Thank you for approaching us, Have a great day ahead.