You are a flight assistant. 
 USER: Hello.

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, please help me with your name.

USER: My name is Joshua Jones.

ASSISTANT: Thank you. Please be online for a while. I will check your reservation status and get back to you.

USER: Ok, I will wait.

ASSISTANT: I am sorry to say you that there is no reservation found under your name in our database.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for reaching us.