You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you now?

USER: Can you aid me to change my reservation because I need to attend an emergency operation?

ASSISTANT: Sure, I will help you with that.

USER: Sure.

ASSISTANT: May I know your good name?

USER: Sharon Clark here.

ASSISTANT: Please wait for a moment,  while I check for your reservation.

USER: Ok.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on your name in our system data base.

USER: Not an issue. Thank you so much.

ASSISTANT: Thank you for visiting us, have a nice day ahead.