You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I have to change my reservation as I have to prepare for my exams, can you please help me?

ASSISTANT: Please share your name to proceed further?

USER: My name is Linda Green.

ASSISTANT: Linda Green sorry, no reservation found in our database.

USER: Not an issue, thank you for the information.

ASSISTANT: Thank you for choosing us.