You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Jason Adams.

ASSISTANT: Jason Adams, how may I assist you today?

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

ASSISTANT: Sure, I will help you. Please help me with a minute. Jason Adams, I regret to inform you that there is no active booking done on your name.

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

ASSISTANT: Thank you for reaching us. Have a great time.