You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I am Donna Thompson. Can please search my recent reservation, which I was recently reserved in advance. Can you please help out? Please change my trip dates in that reservation.

ASSISTANT: Sure, please wait a moment I will check your reservation details and proceed further.

USER: Ok, I can wait for your response.

ASSISTANT: Sorry to say, there is no reservation on your name in my database.

USER: Ok, fine not an issue thank you for checking.

ASSISTANT: Thank you for reaching us, have a nice day.].