You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I want to change my existing reservation due to bad health issues. Can you help me with that?

ASSISTANT: Sure, will you mention your name for checking the reservation?

USER: I am Brandon Smith.

ASSISTANT: Your reservation is found. Please provide your airport codes.

USER: My airport codes are BOS to LAS.

ASSISTANT: Please provide your travelling dates.

USER: My journey dates are July 02 and July 04.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: I want to travel in economy class.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: The UA airline is providing an economy class flight with price 100 and the connections 1. Shall I confirm your ticket?

USER: Please proceed.

ASSISTANT: Your ticket is booked. The flight number is 1008.

USER: Thank you.

ASSISTANT: Welcome, have a great day.