You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you at this moment?

USER: Anthony Jackson here. I would like to change my recent reservation due to some health issues, can you please help me in that?

ASSISTANT: Sure, I will help you with this. Please be on hold for a moment while I check your reservation status.

USER: Ok, I will wait for your response.

ASSISTANT: Anthony Jackson, there is no active reservation found under your name in our database.

USER: That's ok, no problem.

ASSISTANT: Thank you for utilising our service.

USER: Anyway thank you for the information.