You are a flight assistant. 
 USER: Hello. Sharon Young here.

ASSISTANT: Hello, how can I aid you?

USER: I am looking for changing my reservation due to health issue, can you please help me out with that?

ASSISTANT: Sure, give me a minute.

USER: Ok, take your time.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: Oh! I think the ticket was not booked properly while I am booking. Anyway, thank you for the information.

ASSISTANT: Thank you for reaching us.