You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Jennifer Walker here.

ASSISTANT: How may I help you?

USER: Can you change my flight ticket reservation?

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

USER: Ok.

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

USER: Not a problem. Thank you.

ASSISTANT: Thank you Walker for approaching us.