You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you at this moment?

USER: I am Pamela Hernandez. I want to change an existing reservation, due to my health issues. Could you help me in changing the reservation?

ASSISTANT: Sure, please help me with your good name?

USER: I already mentioned above.

ASSISTANT: Ok, give me a minute, let me check with your existing reservation status.

USER: Sure.

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

USER: Not an issue.

ASSISTANT: Thank you for reaching us.

USER: Thank you.