You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Raymond Allen want to visit my sister-in-law home at AZ-PHX.

ASSISTANT: Ok. Can you please share your travelling dates?

USER: My travelling dates are 11/25 and 11/27.

ASSISTANT: What is your source point?

USER:  I will depart from PA-PHL.

ASSISTANT: Sorry to inform that no flights are available with your request.

USER: Ok, thank you for your response.

ASSISTANT: Thanks for availing us, have a nice day.