You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Helen Clark.

ASSISTANT: How can I guide you today?

USER: I am planning to travel from SEA to LAS to meet my friend in Las Vegas, can you help me for booking a flight ticket?

ASSISTANT: Sure, I will help you in booking. Can you please share your travel dates?

USER: My travelling dates are 10/28 and 10/30.

ASSISTANT: Sorry, no flights are available on your route.

USER: That's ok, thank you for checking.

ASSISTANT: Welcome, have a nice day.