You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What type of service you are looking from my side?

USER: Due to my health conditions, I want to change my recent reservation.Can you help me with that?

ASSISTANT: Sure, I am glad to help you with that.

USER: Thank you.

ASSISTANT: May I know your name for changing the reservation?

USER: Ryan Rodriguez here.

ASSISTANT: Please be on hold for some time, so that I will check reservation status.

USER: Sure.

ASSISTANT: We are regret to inform you that, there is no reservation found on your name in our records.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for reaching us. Have a nice day.