You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

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

ASSISTANT: Sure, I am glad to help you. May I know your name to check with the reservation status?

USER: I am Karen Lewis.

ASSISTANT: Can you please wait for a moment while I check with the status?

USER: Sure.

ASSISTANT: Thank you for waiting. Karen Lewis, sorry there is no active reservation found under your name in our database.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for connecting with us.