You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I need to change my existing reservation as my exams got postponed some technical issues, Can you please help me with that?

ASSISTANT: Please share your name.

USER: Sure, Laura Gonzalez here.

ASSISTANT: Please wait a while, I will check and inform you.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry to say, there is no reservation on your name in our database.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for opting us.