You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to travel to LAS with my aunt for her cancer treatment, my source code is BOS.

ASSISTANT: Sure, please provide your dates of travelling?

USER: It will be from 10/17 to 10/19.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: We found a flight with your requirement, can I proceed?

USER: Sure, book it.

ASSISTANT: Your ticket has been booked with flight number 1027, and Delta airline.

USER: Thanks for my reservation.

ASSISTANT: Thank you for choosing us.

USER: Myself Gregory Gonzalez.

ASSISTANT: Thank you for providing your name.

USER: Welcome.