You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

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

ASSISTANT: Sure, I am here to assist you. Can I know your name?

USER: Jennifer Green here.

ASSISTANT: Thank you. Please wait, let me check your reservation status.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found under your name in our database.

USER: Thank you for the help.

ASSISTANT: You are welcome and thank you for choosing us.