You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: Nichole Miller here. Can you book me a ticket from LAS to OAK?

ASSISTANT: Can I know your travel dates?

USER: Sure, here are my travel dates 11/12 and 11/14.

ASSISTANT: Miller. there is no flight available on your requested dates.

USER: No issues, thank you for the help.

ASSISTANT: You are welcome.