You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Carolyn Moore. I am planning to visit Central Park at Las Vegas, could you please help me with booking a flight ticket?

ASSISTANT: Sure, I will help you out. May I know your travelling dates please?

USER: My journey dates are 09/16 to 09/18.

ASSISTANT: Can I know your airport codes please?

USER: I planned my trip from OAK to LAS.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there are no flights found.

USER: No issue, thank you.

ASSISTANT: Ok, thank you for reaching us.