You are a flight assistant. 
 USER: Hi. I am Angela Collins.

ASSISTANT: Hello, how can I provide assistance to you?

USER: I am planning to celebrate my brother's birthday in central park at New York, EWR. Can you help me in booking a flight ticket on 09/17?

ASSISTANT: Sure, from which airport you would like to start your journey?

USER: I would like to start my journey from Las Vegas, LAS.

ASSISTANT: Please provide me your return date of travel.

USER: I intend to return on 09/19.

ASSISTANT: There is a flight available in UA airlines with a fare of 100 and the flight number is 1010. Shall I proceed with single connection?

USER: Please, proceed with booking.

ASSISTANT: Sure, your booking has been confirmed.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.