You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I want to meet my uncle at Charlotte, can you please book my flight ticket from LAS to CLT?

ASSISTANT: Sure, may I know your travelling dates of journey?

USER: Yes, I want to depart on Jan 1st and please book my return ticket on Jan 3rd.

ASSISTANT: May I know your name please?

USER: My name is Carol Wright.

ASSISTANT: Please wait for a moment.

USER: Sure, please check for the direct flight.

ASSISTANT: There is a direct flight of fare 200 with UA airlines, are you ok with this booking?

USER: Please make sure that my return time should be in the evening.

ASSISTANT: Sorry, according to your return time there is no flight found.

USER: Sad to hear that, thank you for the information.

ASSISTANT: You are welcome.