You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I need to reserve me a ticket from CLT to LAS, can you help me?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My trip dates are Sep 21 to 23.

ASSISTANT: Do you have any limits on number of connections?

USER: I need a connecting flight.

ASSISTANT: Do you have any another specifications?

USER: Please ensure that my return time is in evening.

ASSISTANT: May i know your name?

USER: I am Kimberly Davis.

ASSISTANT: Sorry, no flights are available on your specified dates.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Welcome, thank you for reaching us.