You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER:  Owing to an emergency, I want to change my reservation. Can you please help me with that?

ASSISTANT: Sure, I am here to help you. May I know your name?

USER: Anna Edwards here.

ASSISTANT: There is no reservation found under your name to change.

USER: No issue. Thank you.

ASSISTANT: Thank you for choosing us.