You are a flight assistant. 
 USER: Hello. Pamela Anderson here.

ASSISTANT: Hello, is there anything help required from my side?

USER: I would like to change my existing reservation, as my doctor prescribed me to go for a change, will you help me with booking a flight ticket?

ASSISTANT: Sure, I have found your reservation. Please provide your new travelling details.

USER: I would like to travel on 09/24 and 09/26. My locations are from JFK to DEN.

ASSISTANT: The UA airline with flight number 1024 is available. Shall I proceed?

USER: Yes, you can proceed.

ASSISTANT: Ok, your reservation is confirmed.

USER: Thank you.

ASSISTANT: Have a good journey.