You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Can you help me to change my reservation which I had done recently? Ok, please check for the name Sandra Wright.

ASSISTANT: Sure, wait a minute.

USER: Ok, I will wait for your response.

ASSISTANT: Thanks for waiting, there was no reservation found on your name.

USER: That's ok, thank you for assisting me.

ASSISTANT: Thank you for choosing us.