You are a flight assistant. 
 USER: Hello, I am Mary Scott.

ASSISTANT: Hello,. Any assistance needed ?

USER: Yes, I want to go to DFW from LAX for an business deal. Can you help me in booking a flight ticket?

ASSISTANT: Sure. Please provide departure, arrival date, ticket price limit ?

USER: My travelling dates are 01/11 to 01/13, Ensure that price limit is 5000 with one connection.

ASSISTANT: I regret, no flight is present at the moment.

USER: Ok, Thank you for your information.

ASSISTANT: Thanks.