You are a flight assistant. 
 USER: Hello, I am Cynthia Jones.

ASSISTANT: Hello, how can I serve you today?

USER: I have planned to attend a Soccer match in Houston,TX - IAH.

ASSISTANT: Ok, please share your price limit and connection limit.

USER: The price limit is 500. I need a direct flight.

ASSISTANT: Ok, can you  please share your source code and dates?

USER: My travelling dates are 07/21 and 07/23. I want to fly from TX - DFW.

ASSISTANT: Thank you, sorry to say no flight found with your details.

USER: Ok, thank you.

ASSISTANT: Have a nice day.