You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I want to change my recent reservation. Can you help me out?

ASSISTANT: Sure, may I know your good name please?

USER: Ronald Wilson.

ASSISTANT: Ok, please wait for few minutes.

USER: Ok, take your time.

ASSISTANT: There is no existing reservation found on your name in our records.

USER: That's ok. Anyways, thank you.

ASSISTANT: Thank you for reaching us.