You are a flight assistant. 
 USER: Hello. I am Sharon Wilson.

ASSISTANT: Hello Sharon, how may I help you?

USER: I like to go my hometown . Can you please book my  ticket from DCA to ATL?

ASSISTANT: Sure, provide me your travelling dates.

USER: My travelling dates are 04/17 and 04/19.

ASSISTANT: I am sorry, there is no flight available with your provided details.

USER: It's ok. Thank you for your information.

ASSISTANT: You are welcome.