You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you?

USER: I am Patrick Thomas, as my tour with my friends has been postponed because of my job.

ASSISTANT: Ok.

USER: Help me in changing my reservation.

ASSISTANT: Sure, I will help you. Please wait for a while, I will check the reservation with your name.

USER: Sure.

ASSISTANT: Thank you for your patience. We found that, there is no reservation available with your name.

USER: No issues, thank you for your help.

ASSISTANT: Thank you for approaching us.