You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, may I know your name?

USER: My name is Steven Nelson.

ASSISTANT: Wait a minute.

USER: Sure.

ASSISTANT: There was no reservation found on your name.

USER: No problem, thank you for checking.

ASSISTANT: Thank you for choosing us.