You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Kenneth Thompson here.

ASSISTANT: How can I help you at this moment?

USER: I would like to change my reservation as my exams postponed to some other dates, can you please help me with that?

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

USER: Thank you for accepting my request.

ASSISTANT: Please, give me a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, there is no reservation found on your name in our records.

USER: Ok, no issues. Anyway thank you for checking out.

ASSISTANT: Thank you for reaching us.