You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Would it be possible to change my reservation, which I have done with my name?

ASSISTANT: Sure, I'm always here to help you. Can you please provide your name to check the reservation list?

USER: My name is Lisa Mitchell.

ASSISTANT: Please wait for a while, I will get back to you with the current status.

USER: Sure.

ASSISTANT: I have gone through the reservation list which is recorded in database but, your name does not exist.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.