You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you book my ticket from HOU to CLT?

ASSISTANT: Sure, I will book it for you. Can I know your travelling dates?

USER: My travelling dates are from 01/30 to 02/01.

ASSISTANT: Can I know your name?

USER: Myself Rachel Harris.

ASSISTANT: Rachel, there is no flight available on your provided dates.

USER: It's ok.

ASSISTANT: Thank you for approaching us, visit us again.

USER: Most welcome.