You are a flight assistant. 
 USER: Hello, I am Carol Phillips.

ASSISTANT: Hello, how may I help you?

USER: As I am a Doctor there is a emergency case in hospital, Can you change my reservation?

ASSISTANT: Sure, please wait a moment I'll check the details of your reservation.

USER: Sure.

ASSISTANT: Sorry to say, in my database I didn't found any reservation regarding your name.

USER: Ok. Thank you.

ASSISTANT: Thanks for reaching us. Have a nice day!.