You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: Can you please book a ticket from SEA to LAS? As I need to attend my cousin's wedding reception.

ASSISTANT: Sure, May I know the travelling dates?

USER: Sure, my planned departure and return travel dates are 19th and 21st of Jan.

ASSISTANT: Do you have any connection limit?

USER: Yes, I prefer single connected flight.

ASSISTANT: Is there any other requirements?

USER: No, I don't have any other specifications.

ASSISTANT: May I know your name?

USER: Sure, my name is Brandon Lopez.

ASSISTANT: Please wait a minute.

USER: Sure.

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

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

ASSISTANT: Thank you for opting us.