You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: I am Kimberly Hall. As my semester exams got postponed, I need to change my reservation. Can you please help me?

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: There is no reservation found with your provided name.

USER: No problem. Thank you.

ASSISTANT: Thank you for reaching us.