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

ASSISTANT: Hello, how may I guide you today?

USER: I want to book a flight ticket within a price limit of 5000 to watch live sports events at CO - DEN from TX - DFW.

ASSISTANT: Sure, let me know your preferred journey dates.

USER: I am willing to start on 08/17 and return on 08/19.

ASSISTANT: Ok, Is there any class preference?

USER: I prefer economy class.

ASSISTANT: Ok, please share your connection limit.

USER: I need a connection in my journey.

ASSISTANT: Ok, please wait for few minutes.

USER: OK.

ASSISTANT: Sorry for inconvenience, there were no flights found based on your specified details.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.