You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Frank Smith here. Can you please help me in changing my recent reservation , as my exams got postponed to some other date?

ASSISTANT: Sure, give me a minute.

USER: Sure.

ASSISTANT: Sorry, there is no active reservation found under your name.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for reaching us.