You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: To celebrate my sister's birthday, I have to travel from New York to Las Vegas. So, please book a flight with a fare of 200.

ASSISTANT: Sure, please mention if you prefer a halt in between your journey.

USER: Thank you, I need a connecting flight.

ASSISTANT: Kindly share your planned dates of travel.

USER: I planned to travel in between 10/31 to 11/02.

ASSISTANT: May I know your favourable airport codes please?

USER: Sure, it's from New York, EWR to Las Vegas, LAS.

ASSISTANT: Help me with your name please.

USER: I am Donald Walker.

ASSISTANT: Thank you for sharing your details.

USER: Ok.

ASSISTANT: There are no flights found according to your requirements.

USER: Ok, thanks for sharing the information.

ASSISTANT: Thank you for approaching us.