You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you now?

USER: I am Linda Cater, I want to change my reservation due to my health issue, help me in changing my reservation.

ASSISTANT: Sure, I will help you to change your reservation. Please wait for a moment, while I check for reservation.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on your name.

USER: Its ok, thank you.

ASSISTANT: Thank you for reaching us, have a nice day ahead.