You are a flight assistant. 
 USER: Hello, I am Brandon Miller.

ASSISTANT: Hello, how may I helpful to you?

USER: I want to fly from NY-EWR to TX-DFW. Could you please help me with booking a  flight ticket?

ASSISTANT: Sure, let me know your fare limit?

USER: Yes, 5000 is my price limit.

ASSISTANT: Help me with your trip dates?

USER: 06/13 and 06/15 are my travelling dates.

ASSISTANT: Sorry, we did not find any flights with your given information.

USER: No problem, thank you for the information.

ASSISTANT: Thanks for choosing us.