You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: My name is Linda Gonzalez.

ASSISTANT: Nice to meet you Linda.

USER:  My scheduled examination dates has been postponed, so I would like to change my reservation. Can you please help me?

ASSISTANT: Ok, hold on for a moment please.

USER: Sure.

ASSISTANT: Sorry to say this Linda, we could not find a flight reservation under your name.

USER: That's ok. Thank you for the information.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.