You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Owning to an emergency I want to change my existing reservation. Can you help me?

ASSISTANT: Sure, I'll definitely help you in that. May I know your good name please?

USER: Sure, I am Michelle Allen.

ASSISTANT: Fine, please be on hold.

USER: Sure.

ASSISTANT: There is no reservation found active under your name to do changes in that.

USER: Ok, not a problem. Thank you for your information.

ASSISTANT: Thank you for choosing us.