You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you now?

USER: Please help me to change an existing reservation as my trip got postpone due to bad weather conditions.

ASSISTANT: Can you please mention your name? So, I can check with your previous booking in the reservation list.

USER: I am Brandon Robinson.

ASSISTANT: Give me a moment to check.

USER: Sure.

ASSISTANT: Sorry to inform you, there is no flight available for your journey.

USER: Ok, not an issue.

ASSISTANT: Have a nice day.

USER: Thank you for your information.