You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I want to change my reservation due to postponement of my exams, can you please help me out?

ASSISTANT: Sure, I can help you out. May I know your name please?

USER: I am Linda Gonzalez.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: I regret that there is no reservation found on your name.

USER: Ok, no problem. Thank you for your response.

ASSISTANT: Thanks for availing our services.