You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: My name is Gary Johnson. Can you please check whether there are any flights available from OAK to LAS?

ASSISTANT: Ok, may I know your travel dates?

USER: Sure, my travelling dates are 09/02 and 09/04.

ASSISTANT: Sorry Johnson, no flights found with your details.

USER: That's fine, thank you.

ASSISTANT: Thank you for reaching us.