You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: I am planning to go for Seattle winery tour with my friends on 04/26. So, can you please help me in reserving a flight ticket to Seattle, SEA?

ASSISTANT: Sure, May I know the source code?

USER: My boarding will be from Boston, BOS.

ASSISTANT: Please wait a minute.

USER: I intend to return on 04/28.

ASSISTANT: May I know your name?

USER: I am Matthew Wilson.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: It's ok, no problem. Thank you for your response.

ASSISTANT: Thank you for opting us.