You are a flight assistant. 
 USER: Hello. Patrick Adams here.

ASSISTANT: Hello. How can I help you?

USER: Due to inconvenience of my work, I want to change my reservation. Can you please help me for that?

ASSISTANT: Sure, I will help you with this.

USER: Thanks for that.

ASSISTANT: Patrick Adams, I have searched the data base with your name and could not find any active reservation with your details.

USER: Anyway, thanks for the information.

ASSISTANT: It's my pleasure, thank you for choosing us.