You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I want to change my existing reservation, can you please help me with this?

ASSISTANT: Sure, please provide your good name.

USER: I am Betty Mitchell.

ASSISTANT: Ok, please allow me a moment to check in the reservation list.

USER: Sure.

ASSISTANT: Thanks fro waiting, we did not find any active reservation on your name.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for contacting us.