You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you for the day?

USER: I want to change my reservation due to health problem, can you help me?

ASSISTANT: Sure, we will help you with that. May I know on which name the ticket has been reserved?

USER: Check the reservation under the name of Eric Jackson.

ASSISTANT: Please wait a minute, I will check your reservation status and get back to you.

USER: Sure.

ASSISTANT: Sorry to inform you Eric Jackson, there is no reservation found with your name in our records.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for contacting us, hope to serve you again.