You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Can you help me to book a connecting flight?

ASSISTANT: Sure, I am happy to help you. Please let me know your travelling dates.

USER: My travel dates are Aug 16 and Aug 18.

ASSISTANT: Kindly mention your respective airport codes.

USER: My airport codes are LAS and MSP.

ASSISTANT: Is there any other specifications for you?

USER: I would like to return back in the afternoon time.

ASSISTANT: May I know your good name?

USER: I am Betty Mitchell.

ASSISTANT: Sorry, no flights are available on your journey routes.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.