You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Can you aid me to change my reservation due to emergency?

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

USER: Donald Garcia here.

ASSISTANT: I am sorry to say you that there is no reservation found under your name in our database.

USER: No issue. Thank you.

ASSISTANT: Thank you for opting us.