You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I need to change my reservation which I have one earlier to reach the Wander law but unfortunately it was closed due to heavy rains. Can you help me?

ASSISTANT: Sure, I am here to help you with that only. May I know on whose name you want me to check the details?

USER: The ticket is booked previously under Brian Baker.

ASSISTANT: Ok, give me a moment to check the details and modify further.

USER: Sure.

ASSISTANT: Sorry for the inconvenience, there is no active reservation under your name to modify.

USER: It's alright, no problem. Thank you for your quick help.

ASSISTANT: It's our pleasure. Thank you for contacting our service. Have a nice day.

USER: Thank you.