You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I have to attend seminar at Seattle, can you please help me to book a flight ticket from LAS to SEA?

ASSISTANT: Sure, may I know your planned travel dates please?

USER: Sure, my journey dates are Aug 13 and Aug 15.

ASSISTANT: Do you have any airline preferences?

USER: My airline preference is normal-cost.

ASSISTANT: Would you like to travel in a connecting flight or a direct flight?

USER: I need a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: May I know your good name please?

USER: My name is Christine Perez.

ASSISTANT: Sorry, there is no flight available in this route.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching us.