You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hi. How can I assist you?

USER: Could you help me in booking a flight ticket?

ASSISTANT: Sure. Will you please provide me your source and destination?

USER: My source is Philadelphia PA-PHL to Chicago IL-ORD.

ASSISTANT: May I know your travel dates for checking the flight?

USER: And, my travelling dates are 02/03 to 02/05.

ASSISTANT: Please hold on a minute, let me check it. Thank you for waiting. Sorry for the inconvenience, there is no flight found for you. May I know your good name for documentation purpose?

USER: Yes, my name is Ryan Anderson. OK,thank you.

ASSISTANT: Thank you for reaching us.