You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Ashley Baker here.

ASSISTANT: How may I assist you today?

USER: I would like to change my reservation as I got an appointment with a famous psychiatrist, can you help me?

ASSISTANT: Sure, please wait for a minute.

USER: Ok, I will be waiting for your response.

ASSISTANT: Sorry, I could not find any reservation with your name in our database.

USER: That's very disappointing news for me. Anyways, thank you for checking.

ASSISTANT: My pleasure.