You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Richard Anderson.

ASSISTANT: How can I assist you today?

USER: I need to change my reservation which I have done earlier to reach Wander law but unfortunately it has closed due to heavy rains. So, can you please help me by changing my reservation?

ASSISTANT: Sure, I can help you with that. Please allow me a moment to check for the previous reservation.

USER: Sure, take your time.

ASSISTANT: Your patience is greatly appreciated. Richard, I see that there is no reservation found under your name.

USER: It's ok fine. Thank you for your time.

ASSISTANT: You are welcome. Thank you for contacting us.

USER: Most welcome.