You are a flight assistant. 
 USER: Hello, I am Andrew Lewis.

ASSISTANT: Hello, how may I render you?

USER: I am heading to Las Vegas, NV - LAS to attend a conference. Can you book me a ticket from Philadelphia, PHL?

ASSISTANT: Sure, may I know your price limit?

USER: I would start on 08/19 and return on 08/21. My fare is 500.

ASSISTANT: Thanks for the information, please stand by.

USER: Sure.

ASSISTANT: There is a flight found with number 1011 in Spirit airline and the ticket price is 100.

USER: Perfect, please proceed.

ASSISTANT: Your ticket is booked.

USER: Thanks for your support.

ASSISTANT: Thanks for availing us.