You are a flight assistant. 
 USER: Hello, I am Gregory Moore.

ASSISTANT: Hello, how may I help you Gregory Moore?

USER: Due to some personal work, I want to change my existing reservation. Can you help me with this?

ASSISTANT: Sure, we are blissful to help you. Please give me a minute.

USER: Sure, I will wait for your response.

ASSISTANT: Thanks for your time, no reservation was found based on your good name.

USER: Ok, Thank you for providing information.

ASSISTANT: Thank you for reaching us with a query.