You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Melissa Walker, I want to change my reservation as my exams got postponed. Can you please help me about that?

ASSISTANT: Sure, may I know your travelling dates please?

USER: Ok, my travelling dates are 02/09 and 02/11.

ASSISTANT: Wait for a minute.

USER: Sure.

ASSISTANT: According to your travelling dates, we did not found any reservation with your name.

USER: Not an issue with that, it might be cancelled by my manager. Anyways thank you for the information.

ASSISTANT: May be, anyway, thank you for approaching us.

USER: You are welcome.