You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Patricia Lee, want to travel from ATL to PHX. Can you help me?

ASSISTANT: May I know your travelling dates?

USER: My travelling dates are from 04/30 to 05/02.

ASSISTANT: Sorry, there is no flight available.

USER: That's fine, thank you for your help.

ASSISTANT: Most welcome.