You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Donald Clark.

ASSISTANT: How may I help you?

USER: I would like to change my reservation which is under my name. Can you please help me with that?

ASSISTANT: Sure Clark, I am here to help you. Let me check your reservation status in our records.

USER: Sure, take your time.

ASSISTANT: Donald sorry to intimate, no reservation is found on your name in our records.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: You are welcome.