You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

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

ASSISTANT: Certainly, I can do that for you. Will you please let me know your name?

USER: Nancy Campbell here.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found under your name in our data base.

USER: Thank you for the help.

ASSISTANT: Thank you for reaching us.