You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: I am planning to celebrate my father birthday on his house. Please help me to do the reservation.

ASSISTANT: Sure, I am glad to help you. May I know your name and travelling details?

USER: My name is Paul Martinez. Dates are 11/12 and 11/14. My airport codes are DFW-PHL.

ASSISTANT: Thank you for providing the details. Please wait a moment, I will search the flight with your given details and let you know.

USER: Ok.

ASSISTANT: Thank you for waiting, We are to inform you that there were no flights available based an your details. Thank you for choosing us, Have a good day.

USER: Thank you for your quick response.