You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I  help you?

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

ASSISTANT: Sure, may I know your name please?

USER: My name is Jeffrey Williams.

ASSISTANT: I am sorry no flights found on your name.

USER: Not an issue, thank you for checking.

ASSISTANT: Thank you for choosing us.