You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, can you tell me how can I assist you?

USER: I want to change my reservation because I am unwell, can you please help me?

ASSISTANT: Ok, may I know your name?

USER: My name is Emily Miller.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry, no reservation found with your name.

USER: Not an issue, anyway thank you for the information.

ASSISTANT: Most welcome.