You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: My name is Michael Gonzalez. I have a plan to meet my father in Charlotte, can you help me for booking a flight ticket from SEA to CLT?

ASSISTANT: Sure, can you please share your trip dates?

USER: My travelling dates are from 07/22 till 07/24.

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

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

ASSISTANT: Welcome, have a nice day.