You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I would like to attend live music concert at Charlotte, can you please reserve from LAS to CLT?

ASSISTANT: May I know your travelling dates?

USER: Sure, my planned travelling dates are Apr, 12 and 14 respectively.

ASSISTANT: Can I know your name please?

USER: Michael Walker here.

ASSISTANT: Ok, please wait.

USER: Sure, I will wait.

ASSISTANT: Sorry, no flights available on your route.

USER: Ok, not an issue.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your service.