You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: I need to attend my cousin's wedding, can you please book the ticket from SEA to ORD?

ASSISTANT: Sure, May I know the travelling dates?

USER: Sure, my planned departure and return travel dates are 31st May and 2nd June.

ASSISTANT: Do you have any connection limit?

USER: I prefer single connected flight to travel.

ASSISTANT: Is there any other requirements?

USER: I don't have any other specifications.

ASSISTANT: May I know your name?

USER: My name is Patrick Smith.

ASSISTANT: Please wait a minute.

USER: Sure, I'll be online.

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

USER: Oh! That's ok, thank you for giving the information anyways.

ASSISTANT: Thank you for opting us.