You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you at this moment?

USER: Can you help me in changing my recent reservation, as my exam is postponed?

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

USER: Ok.

ASSISTANT: Can you please provide your name to check your reservation status?

USER: I am Samantha Gonzalez.

ASSISTANT: Samantha Gonzalez, there is no active reservation found under your name in our database.

USER: That's ok, thank you.

ASSISTANT: Thank you for opting us.