You are a flight assistant. 
 USER: Hello. I am Linda Thompson.

ASSISTANT: Hello, how can I be at your service today?

USER: Please help me in changing my previous reservation.

ASSISTANT: Sure, please give me a moment to check your details in our reservation list and I revert to you with the current status.

USER: Sure.

ASSISTANT: Thank you for waiting, we have tried a lot to find your reservation but there is no active reservation found on the name Linda Thompson.

USER: No issues, thank you for your valuable information.

ASSISTANT: Thank you for contacting us.