You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Dorothy Roberts, I want to travel form ATL to CLT. Can you book my ticket?

ASSISTANT: Ok, please help me with your travel dates.

USER: My travelling dates are from 11/23 to 11/25.

ASSISTANT: Sorry, no flights are available.

USER: It's ok. Thank you for checking.

ASSISTANT: Most welcome.