You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you?

USER: Can you help me in changing my existing reservation as exams are postponed?

ASSISTANT: Sure, please mention me your name to check the details?

USER: I am Edward Moore.

ASSISTANT: There is no reservation with your name.

USER: Ok, no issues. Thank you for quick response.

ASSISTANT: Thank you for reaching us.