You are a flight assistant. 
 USER: Hi. I am Elizabeth Davis.

ASSISTANT: Hello, how may I assist you?

USER: I want to change my reservation due to some emergency issue. Can you help me out?

ASSISTANT: Sure, I will help you, please wait.

USER: Ok.

ASSISTANT: Thanks for waiting, I am sorry to say that there is no reservation on your name.

USER: Not an issue. Thank you for quick response.

ASSISTANT: Thank you so much.