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

ASSISTANT: Hello, how may I aid you?

USER: I need to book a flight ticket to New York, NY-LGA to 04/21 from Las Vegas, NV-LAS to attend Ed sheeran live concern.

ASSISTANT: Ok, may I know when will you return?

USER: My return would be on 04/23.

ASSISTANT: Ok, we found a Spirit airline with flight number 1013 and price of 100 available for you. Shall I book the ticket?

USER: Ok, you can go a head.

ASSISTANT: Ok. Your booking has been done.

USER: Thank you.

ASSISTANT: Thank you for reaching us.