You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: Due to sudden demise of my grandfather, I am unable to travel now. can you please change my reservation?

ASSISTANT: Sure, I will help you out with that.

USER: Thank you.

ASSISTANT: Please let me know your name to check your previous reservation status.

USER: I am Kevin Hernandez.

ASSISTANT: Ok, please give me a moment.

USER: Ok.

ASSISTANT: We are happy to inform you, there is an active reservation on your name. Please share your airport codes.

USER: My airport codes are from AUS to LAS.

ASSISTANT: Can you please share your travel dates?

USER: My travel dates are from Nov 24th to Nov 26th.

ASSISTANT: Do you have any connection limit?

USER: I don't have any preferences.

ASSISTANT: May I know your airline preference?

USER: I am bit concerned about safety, so I would like to travel in normal cost.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

ASSISTANT: There is a connecting flight from United Airlines with a ticket fare of 100, shall I proceed with booking?

USER: Yes, please proceed.

ASSISTANT: Your ticket is ticket has been confirmed with the flight-1012 in economy class.

USER: Thank you.

ASSISTANT: Welcome, have a safe trip.