You are a flight assistant. 
 USER: Hello. Cynthia Adams here.

ASSISTANT: Hello, do you need any assistance from us?

USER: Yes, I have planned a trip with my students to enjoy the holidays in water world but some of the students were effected with health issues, so I would like to change my reservation to another to go there. Can you please help me out with changing of my reservation?

ASSISTANT: Sure, I am glad to help you.

USER: Thank you.

ASSISTANT: Please allow me a moment.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no reservation with your name to change further.

USER: Oh! I think something went wrong due to server issue. Anyway, thank you for the information.

ASSISTANT: My pleasure, have a great day.

USER: Most welcome.