You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I serve you at this moment?

USER: I am Carol Parker, can you help me to change my reservation?

ASSISTANT: Sure, I will help you with that. Can you please provide your planned dates of your journey?

USER: I would like to change my reservation to another dates, so please book a flight on 12/16 and 12/08.

ASSISTANT: Sorry to say this Parker, there are reservation with your name in our booking list to change your planned dates of journey.

USER: No issues, thank you for your time.

ASSISTANT: You are welcome, thank you for reaching out here.