You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am looking for a flight from CLT to LAS, can you please help me in booking?

ASSISTANT: Sure, I will help you. Can you please share me your travelling dates?

USER: My travelling dates are Nov 21 and Nov 23.

ASSISTANT: Ok, please share me your name.

USER: My name is David Carter.

ASSISTANT: Ok, do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Sorry, no flights are available on your route.

USER: That's ok, thank you for checking.

ASSISTANT: Welcome, have a nice day.