You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Due to some entrepreneurship meeting, I am going to change my existing reservation. Can you please help me in changing the reservation?

ASSISTANT: Sure, please help me with your name to check your reservation details in our database.

USER: I am Carol Robinson.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, I did not find any reservation by your name in our database.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.