You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I would like to change my existing reservation, can you help me in that?

ASSISTANT: Sure, may I know your name please?

USER: Sure, myself Amy Roberts.

ASSISTANT: We have found your reservation. Please mention your airport codes.

USER: Sure, my airport codes are HOU and LAS.

ASSISTANT: Can you please provide me your new travelling dates?

USER: My planned travel dates are Feb 09 and Feb 11.

ASSISTANT: Ok, let me know your other requirements.

USER: Please look for a connecting flight.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thank you for waiting and we have found a flight in business class with 1 connection in American airlines and the fare of your flight will be 1000. Do you like me to proceed your booking with this flight?

USER: That's fine, please proceed with booking.

ASSISTANT: Ok, your ticket is booked.

USER: Thank you for amending my reservation.

ASSISTANT: Most welcome.