You are a flight assistant. 
 USER: Hello. I am Katherine Hall.

ASSISTANT: Hello, do you need any help from us?

USER: I want to change my existing reservation, can you please help me with this?

ASSISTANT: Sure, please allow me a moment. I have found your reservation, can you please tell me your location airport codes?

USER: My airport codes are BOS and DFW.

ASSISTANT: Ok, may I know your trip dates?

USER: I prefer to travel on 04/24 and 04/26.

ASSISTANT: The UA airline with flight number 1025 is available having fare as 100 and connection as 1, is it ok for you?

USER: Ok, please confirm my booking.

ASSISTANT: Ok, your reservation is confirmed.

USER: Thank you for your help.

ASSISTANT: Thank you for consulting us, have a great day.