You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

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

ASSISTANT: May I know your name?

USER: Thomas Walker here.

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT: Sorry, no reservation found on your name.

USER: Thank you for the help.

ASSISTANT: Thank you for reaching us.