You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Would you help me in changing my reservation with the name of Kevin Campbell?

ASSISTANT: Ok, please wait.

USER: As my exams was postponed due to heavy snow-storms.

ASSISTANT: Okay. We did not found any reservation on you name.

USER: Ok. Thank you for your response.

ASSISTANT: Thanks for choosing us.