You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Owing to an emergency I had to request for this change reservation, Can you please help me in that?

ASSISTANT: Sure, I am happy to help you. May I know your name?

USER: My name is Nicole Mitchell.

ASSISTANT: Thank you. Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, I have not found any reservation under your name in our database.

USER: Ok, that's not a problem. Thank you.

ASSISTANT: You are welcome and thank you for choosing us.