You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Brandon Smith.

ASSISTANT: Smith can I know, what help you are looking from our agency?

USER: I want to hangout with my friends in New York, can you please help me to book my flight ticket?

ASSISTANT: Sure, can I know the dates of travel please?

USER: Sure, I want to depart on 07/02 and return on 07/04.

ASSISTANT: May I know your take off and landing airport codes please?

USER: I want to take off from OAK airport and land in LGA airport.

ASSISTANT: Give me a moment please I will get back to you.

USER: Sure.

ASSISTANT: Sorry, there are no flights on your dates.

USER: No problem, thank you for checking.

ASSISTANT: Thank you for reaching us, have a good day.