You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am Patrick Lewis. I wish to go for Brooklyn walking tour at New York, EWR with my cousin. Can you please book a direct flight for me?

ASSISTANT: Sure, please forward your travelling dates?

USER: Journey dates are 01/29 to 01/31.

ASSISTANT: Can you please share your source code?

USER: Origin code is Seattle, SEA.

ASSISTANT: Thanks for your details, there is no flight found on your desired routes.

USER: No problem. Thank you.

ASSISTANT: Thank you for choosing us.