You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to book a ticket from OAK to LAS, can you assist me?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: My trip dates are Sep 28th and Sep 30th.

ASSISTANT: Sure, can I know your name?

USER: Jonathan Collins.

ASSISTANT: Let me know your connection limit?

USER: I need one connection between my trip.

ASSISTANT: Do you have any specifications?

USER: I need normal cost airlines.

ASSISTANT: Sorry to say, no flight is available for you.

USER: No problem, thank you for searching.

ASSISTANT: Thank you for reaching us.