You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I am Sandra Young. Would it be possible to change my reservation to new travel dates?

ASSISTANT: Sure, please wait for a moment to check your reservation details.

USER: Ok, take your time to get my reservation status.

ASSISTANT: Thank you for waiting. No reservation found on your name in my database.

USER: It's ok, not an issue. Thanks for checking.

ASSISTANT: Thank you for reaching us.