You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

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

ASSISTANT: Sure, I can help you out quickly. May I Know your name?

USER: Sharon Clark here.

ASSISTANT: Please wait for a minute.

USER: Ok.

ASSISTANT: Thanks for being waiting. We didn't found any reservation by this name.

USER: No problem, Thanks for the information.

ASSISTANT: Thank  you for choosing us.