You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Due to some issues, I am willing to change my existing reservation. Can you please help me for this?

ASSISTANT: Sure, can you provide your name?

USER: Myself Raymond Allen.

ASSISTANT: Give me a minute for checking your status.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: Not a big deal, anyhow thank you very much for your service.

ASSISTANT: Thank you for reaching us.