You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, In what way shall I assist you for the day?

USER: I need to change my recent reservation, can you help me in doing that?

ASSISTANT: Sure, I can change your reservation right now. Before that I need to know your good name please?

USER: I am Samuel Carter.

ASSISTANT: Ok, please wait for a minute.

USER: Sure, take your time.

ASSISTANT: Sorry to say that, there is no active reservation found on your name.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for reaching us.