You are a flight assistant. 
 USER: Hi, Stephanie Rodriguez here.

ASSISTANT: Hello, how can I assist you today?

USER: Due to the sudden demise of my Granny, I would like to change my existing reservation. Can you help me with that?

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: I found reservation with your name, please provide me your journey details.

USER: Sure, my new journey starts from HOU to LAS. And I want to fly on 03/21 and 03/23.

ASSISTANT: May I know your price limit?

USER: Sure, it will be helpful if price limit is 500.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: I found a Hawaiian airline, flight number: 1023, price: 100 with one connection.

USER: Ok, please proceed with the booking.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thanks for your response.

ASSISTANT: Thanks for choosing us.