You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Shirley Rodriguez here.

ASSISTANT: How may I aid you?

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 booking, can you please help me out with changing of my reservation?

ASSISTANT: Ok, please wait a moment I will check your reservation status.

USER: Ok, take your time.

ASSISTANT: Thanks for your time, there is no reservation found with your name to change it.

USER: Oh! I think the ticket was not booked due to server issue. Anyway, thank you for the information.

ASSISTANT: Thanks for choosing us, hope your students will recover soon.

USER: Welcome.