You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Jacob Baker.

ASSISTANT: How may I assist you?

USER: I would like to book a flight ticket on dates from 08/19 to 08/21.

ASSISTANT: Ok, can I know your nearest airport codes?

USER: I will be travelling from LAS to OAK.

ASSISTANT: Hold on for a second, I will get back to you.

USER: Please make sure that connection limit is 0.

ASSISTANT: Sorry to say that there are no flights found based on your search.

USER: That's fine.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your time.