You are a flight assistant. 
 USER: Hi, I am Gary Mitchell.

ASSISTANT: Hello, how may I oblige you today?

USER: My exams got postponed to future dates, can you please help me in changing the reservation?

ASSISTANT: Sure, we are pleased to help you.

USER: Thank you.

ASSISTANT: Please hold on a moment, I will check the reservation list and get back to you.

USER: Ok.

ASSISTANT: Thanks for waiting, no reservation found on the name of Gary Mitchell in our database.

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

ASSISTANT: Thank you for choosing us.