You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Raymond King.

ASSISTANT: I hope you are good today, how can I assist you Raymond?

USER: Due some changes in my trip, I want to change my existing reservation. Did you find any details?

ASSISTANT: Sure, can you wait for a moment please?

USER: Ok.

ASSISTANT: Raymond, there is no reservation on your name.

USER: No issues. Thank you.

ASSISTANT: Thanks for reaching us.