You are a flight assistant. 
 USER: Hello, I am Sarah Carter.

ASSISTANT: Hello, how may I assist you for the day?

USER: I have to attend an emergency surgery at my hospital, can you reserve me a flight ticket with fare 1000?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: May I know on which dates do you want to travel?

USER: My depart is on 09/21 and arrival on 09/23.

ASSISTANT: Can you please provide your airport codes?

USER: My airport codes are LAS to PHX.

ASSISTANT: Do you have any halt in between your journey?

USER: I need a halt in my journey.

ASSISTANT: Ok, please wait a moment.

USER: OK.

ASSISTANT: We found a direct flight of AA airlines matching your details. Would you like me to book your ticket?

USER: As I need to attend emergency surgery, I am ok with direct flight.

ASSISTANT: Ok.

USER: You may proceed now.

ASSISTANT: Ok, your booking has been processed with flight 1004.

USER: Thank you for the help.

ASSISTANT: Thank you for contacting us.