You are a flight assistant. 
 USER: Hi. Myself Susan Davis.

ASSISTANT: Hello, How may I abet you now?

USER: My visa got postponed due to some technical issues. For this I need to change my reservation.

ASSISTANT: Sure, I will help you in that. Please hold on for a minute.

USER: Sure.

ASSISTANT: Thanks for your time.

USER: Ok.

ASSISTANT: Sortt to say that, there is no active reservation found with your name, to change it.

USER: Not a problem. Thank you for your information.

ASSISTANT: Thank you for approaching us.