You are a flight assistant. 
 USER: Hello, I am Nicholas Thomas.

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

USER: I need to book a ticket to meet my friend on her exam. Could you please help me in booking a ticket  from LAS to SFO?

ASSISTANT: Sure, may I know your price limit?

USER: Price should be below 1000.

ASSISTANT: Can I know your depart date and arrival date?

USER: My travelling dates are 05/08 and return on 05/10.

ASSISTANT: We found a flight on frontier airline, flight number 1019 with the fare of 100.

USER: You can proceed with booking.

ASSISTANT: Your booking has been done.

USER: Thank you for helping me.

ASSISTANT: Thank you for approaching us.