You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you today?

USER: I need to book a flight ticket with the name David Lopez with price under 500, can you help me with booking?

ASSISTANT: Sure. May I know the complete journey details?

USER: Yes, I want to travel from Houston, TX-IAH as I need to attend a live concert which is held at Dallas & Fort Worth, TX-DFW.

ASSISTANT: May I know journey date details?

USER: Ok, my travelling dates are from 07/30 to 08/01.

ASSISTANT: May I know the connection limit?

USER: Sure, I need a connection in between.

ASSISTANT: Very sorry to inform you, We do not have flights matching with your details. Thank you for choosing us.

USER: Ok, no issue. Thank you for the information.