You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Carolyn Clark here. I want to attend my colleague's ring ceremony at DFW. Can you please make a reservation from PHX?

ASSISTANT: Sure, we are pleased to serve you. Can you share me your trip dates?

USER: Thank you, my travelling dates are July 17 - July 19.

ASSISTANT: Do you have any other requirements?

USER: Yes, I need a direct flight.

ASSISTANT: Sorry to say, there are no flights found with your requirements.

USER: Ok, no issues. Thank you for the help.

ASSISTANT: Thank you for choosing us, we hope to serve you again.