You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Kevin Garcia. Can you please book me a ticket from DFW to PHX to meet my old friends?

ASSISTANT: Sure, please share your planned trip dates?

USER: I have planned to travel on 08/22 and 08/24.

ASSISTANT: Ok, any other requirements to be met?

USER: Yes, I need a halt.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, no flights found with your requested details.

USER: Ok, no problem.

ASSISTANT: Thank you for opting us.

USER: Thank you.