You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I planned to meet my friend in LAS, can you please help me to book a flight ticket from SEA?

ASSISTANT: Please provide your trip dates.

USER: I prefer to travel on May 22 and May 24.

ASSISTANT: Do you need any connection limit?

USER: I prefer to travel in a connecting flight.

ASSISTANT: Do you need any other specifications?

USER: I would like to depart in evening.

ASSISTANT: May I know your name?

USER: I am Shirley Garcia.

ASSISTANT: There are no flights available on your routes.

USER: Ok, no problem. Thank you for your information.