You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: My name is Richard Garcia, I want to book a flight on 09/08 to attend a meeting. Can you book a connecting flight for me?

ASSISTANT: Sure, may I know your source and destination?

USER: I will fly from WA-SEA to PA-PHL.

ASSISTANT: Ok, on which date you want to return?

USER: I will return on 09/10.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: Thank you for the information.

ASSISTANT: Thank you.