You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

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

ASSISTANT: Can I know your name?

USER: Debra Campbell here.

ASSISTANT: Sorry, there is no reservation by your name.

USER: Thank you for the help.

ASSISTANT: Thank you.