You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Due to health issue, I want to change my reservation. Can you help me?

ASSISTANT: Sure, I am glad to help you.

USER: Thank you.

ASSISTANT: Can you please forward your good name with us?

USER: Sure, My name is Emma Smith.

ASSISTANT: Please wait for a while. I will check in the reservation list and revert you.

USER: Sure.

ASSISTANT: There is no reservation found on your name in our database.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for opting us.