You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Can you help me in reserving my flight ticket from PHL to DFW?

ASSISTANT: Sure, can I know the travel dates please?

USER: My preferable journey dates are Jan 31 and Feb 02.

ASSISTANT: Do you have any requirements?

USER: I prefer direct flight for this trip.

ASSISTANT: May I know your name please?

USER: My name is Frank Lopez.

ASSISTANT: Sorry, there are no flights available as per your request.

USER: Ok, not an issue. I will find any alternate for this trip.

ASSISTANT: Thank you for approaching us.

USER: Thank you for providing information.