You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I am Mark Edwards, would it be possible to change my reservation to new travel dates?

ASSISTANT: Sure, I am gleeful to help you. please wait for a moment to check your details.

USER: Sure, take your own time.

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

USER: It's ok, thanks for checking my reservation status.

ASSISTANT: Thank you for contacting us.