You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am Elizabeth Harris. I want to change my flight reservation as I am unwell, can you please help me?

ASSISTANT: Elizabeth Harris, I am glad you have contacted us. I will help you.

USER: Thank you.

ASSISTANT: Please allow me a moment.

USER: Sure.

ASSISTANT: I notice that there is no active reservation done on your name.

USER: Oh! Not an issue. Anyway, thank you for checking.

ASSISTANT: Thank you for reaching us. Have a great time.