You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you for the day?

USER: Can please assist me in booking my flight ticket from PHL to DFW?

ASSISTANT: Sure, may I know your preferred dates of travel?

USER: My prefer Mar 16 and Mar 18 as my journey dates.

ASSISTANT: Do you need any stopover in between your journey?

USER: I need direct flight.

ASSISTANT: Is there any other requirements?

USER: No.

ASSISTANT: May I know your name?

USER: Myself Amy Hall.

ASSISTANT: Ok, please wait a minute.

USER: Ok, sure.

ASSISTANT: Sorry, there were no flights found on your route.

USER: Ok, fine thank you for your information.

ASSISTANT: Thank you for reaching us, hope to serve you next time.