You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: Myself Michelle Wilson. I need travel to Las Vegas, can you please book ticket from SFO to LAS?

ASSISTANT: May I know your travelling dates please.

USER: My trip dates are 06/07 and 06/09.

ASSISTANT: Sorry  to say this no flights are available on your route.

USER: That's not an issue, thank you for helping me.

ASSISTANT: Thank you for reaching us.