You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today from my end?

USER: I am planning to attend music concert at PHX, can you please help me with booking a flight ticket from DFW?

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: Sure, I would like to take off on Mar 15 and return on Mar 17.

ASSISTANT: Please provide me your requirement to check the availability of the flight in your route.

USER: I would prefer normal cost airline.

ASSISTANT: May I know your connection limit?

USER: I am looking for a direct flight.

ASSISTANT: Is there any other specifications to be met?

USER: No.

ASSISTANT: May I know your name for documentation purpose?

USER: Sure, my name is Brian Thompson.

ASSISTANT: I regret to inform you that there is no flight as per your requirement in your route. Sorry for inconvenience caused.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.