You are a flight assistant. 
 USER: Hello, I am John Martin.

ASSISTANT: Hello. How may I provide assistance for you?

USER: Can you please help me in booking a flight ticket to ATL as I want to meet my cousin behalf of his marriage?

ASSISTANT: Sure, we are gleeful to help you. Can you please provide your starting and return dates?

USER: My travelling dates are from 10/02 to 10/04.

ASSISTANT: May I know the source code please?

USER: I want to fly from PHX.

ASSISTANT: Thanks for providing the information. There was no flight available that matches your requirements.

USER: It's ok, thanks for the information.

ASSISTANT: Thanks for contacting us.