You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I want your help in making some changes in my existing reservation, due to the busy schedule on my previously planned dates. Can you please help me with this?

ASSISTANT: Sure, may I know your name please?

USER: Sure, I am Pamela Harris.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there was no reservation found with your given name.

USER: Ok, Thank you.

ASSISTANT: Thank you for opting us.