You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Myself Jack Phillips.

ASSISTANT: Welcome to flight booking agency Jack. How may I assist you at this moment?

USER: I have done my reservation long back for my exams as there is a change in a weather I need to re-modify my reservation. Can you please help me with that?

ASSISTANT: Sure, I am glad to help you with that.

USER: Good to hear that you are going to help me about my request.

ASSISTANT: Please wait a moment to check your previous reservation status.

USER: Sure, have your time.

ASSISTANT: When I have checked your reservation in our database, there is no reservation on your name.

USER: Oh! It might not be done properly at the time of booking due to my server issue. Anyways thank you for checking my previous reservation and letting me about that.

ASSISTANT: Thank you for reaching us, hope you have a great day.

USER: You are most welcome.