You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am Brain Thomas, I am planning to book a flight from New York to meet my grand father. Can you book a flight to AZ-PHX?

ASSISTANT: May I know your trip dates?

USER: I will fly on 10/22 and return on 10/24.

ASSISTANT: Can you please share your origin airport code?

USER: My source point is NY-LGA.

ASSISTANT: Sorry, there is no flights found on your given details.

USER: Ok, thank you for the details, I will repaln my trip and get back to you.

ASSISTANT: Thanks for choosing us.