You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,.

USER: My name is Rachel Adams.

ASSISTANT: How can I help you today?

USER: As I am a doctor, I want to attend for an emergency surgery. So I want to change my existing reservation. Can you help me with that?

ASSISTANT: Sure, we are here to help you. Ok, please wait I will check and let you know the details.

USER: Ok.

ASSISTANT: Sorry to inform you that there is no reservation found in your given name.

USER: Ok, no problem. Thanks for your service.

ASSISTANT: Thank you for reaching us. Have a nice day.