You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what type of help you are looking from us?

USER: Myself Angela Clark. I am planning to visit my grand parents at Phoenix, will you help me in booking the flight ticket from DCA to PHX?

ASSISTANT: Sure, I am glad to help you about your flight ticket booking.

USER: Thank you for accepting my request.

ASSISTANT: Can you please let me know your planned dates of your journey?

USER: My travelling dates are 12/11 and 12/13.

ASSISTANT: Please wait for a while to check the flight availability.

USER: Ok, I will wait for your response.

ASSISTANT: Sorry to say this Clark, there are no flights which travels to your region.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: You are most welcome, thank you for reaching out here.