You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: I need to modify my reservation as my exams got postponed due to bad weather. Can you please help me out?

ASSISTANT: Sure, I am here to help you with that.

USER: Thank you for considering my request.

ASSISTANT: Could you provide me your full name?

USER: Sure, my name is Barbara Carter.

ASSISTANT: Sorry to inform you that, there is no reservation found on your name in our database. Thank you for reaching us.

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

ASSISTANT: You are welcome.