You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Steven Nelson.

ASSISTANT: How may I aid you today?

USER: 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 date to go there. Can you please help me out with changing of my reservation?

ASSISTANT: Sure, I will help you in changing, can you please hold on for a moment to check your any active reservation with your name in my database.

USER: Sure, I will wait for your response.

ASSISTANT: Nelson, there is no any active reservation with your name in my database.

USER: No problem with that one, than you for your service.

ASSISTANT: It's my pleasure.