You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello,.

USER: I am Patrick Adams.

ASSISTANT: How can I best serve you?

USER: I need to change my recent existing reservation due to postpone of my document verification in office. Can you please help me in this?

ASSISTANT: Sure, we are mirthful to help you.

USER: Thank you.

ASSISTANT: Please wait for some time, I will check with your reservation status and revert to you.

USER: Ok, I will wait.

ASSISTANT: Thanks for being patience, we are sorry to inform you that, we did not find any reservation against your name.

USER: Not an issue. Thank you for your information.

ASSISTANT: Thanks for approaching us, hope to serve you again.