You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, May I know what kind of service you are expecting from us?

USER: Can you please help me in changing my reservation as my exams got cancelled?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Can you share me your good name please?

USER: Melissa Wilson here.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Thanks for your time, there is no active reservation found in your name.

USER: Ok, no problem. Thank you for checking out.

ASSISTANT: Thank you for reaching us.