You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I want to celebrate my birthday with my family at Charlotte, can you please help me to book a flight ticket from PHX to CLT?

ASSISTANT: I am glad to help you with this booking May I know your travelling dates please?

USER: Sure, my journey dates are July 07 and July 09.

ASSISTANT: Do you need any specifications?

USER: No.

ASSISTANT: Can I know your name please?

USER: My name is Dorothy Robinson.

ASSISTANT: Sorry, there are no flights found.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your help.