You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you today?

USER: I want to change an existing reservation due to an emergency, can you please help me?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: May I now your name please?

USER: Sure, my name is Cynthia Hill.

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

USER: Ok, not an issue.Thank you for your information.

ASSISTANT: Thank you for reaching us.