You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What service that you are looking from our agency?

USER: I need a direct flight for my journey to Las Vegas for attending a small event in the month of March. Can you please help me in booking my flight ticket from my current location Oakland?

ASSISTANT: Sure, I am glad to help you with that.

USER: Thank you for considering my request.

ASSISTANT: Can you please provide your preferable departure and return dates to go there?

USER: Sure, my departure and return dates are 03/27 and 03/29 respectively.

ASSISTANT: Ok, may I know your origin and destination airport codes for booking?

USER: Sure, my origin and destination codes are OAK and LAS.

ASSISTANT: Please wait a moment to check the flights availability in your route and I will get back with a best flight for you.

USER: Sure, have your time and if possible please search a flight with in by budget limit of 200.

ASSISTANT: We regret to inform you that because of the heavy rains in your travel locations direct flights are not available.

USER: Not an issue, anyway thank you for the help.

ASSISTANT: Can I know your name for documentation purpose?

USER: Sure, my name is Christine Moore.

ASSISTANT: Sorry for the inconvenience caused to you Moore.

USER: Ok no issues, thank you for your services.

ASSISTANT: Thank you for approaching us, hope you have a great day.