You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you?

USER: Owing to an emergency I have to go to Austin, TX - AUS on 11/20 to see my grand father.

ASSISTANT: Ok, please provide your other details.

USER: So I want to book a round trip flight. My return date is on 11/22.

ASSISTANT: Can you please provide your name?

USER: Please make the booking with the name Charles Lewis.

ASSISTANT: Ok. There is a flight in UA airline with the number of 1001 and the cost of the ticket is 100 with single connection. Shall I proceed for booking?

USER: Please proceed.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thanks for choosing us.