You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. May I know your good name?

USER: I am Gregory Williams.

ASSISTANT: How can I assist you today?

USER: As I have reserved my ticket last nice but your agent reserved my flight ticket with other name. So I would like to change my reservation, help me with it?

ASSISTANT: Sure, we will help you in changing your reservation. Wait for a while.

USER: Sure.

ASSISTANT: Thanks for your precious time. There is no reservation exists on your name Gregory Williams in our reservation database.

USER: Its ok, thank you for your fast response.

ASSISTANT: Thank you for reaching us, have a beautiful day.