You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Can you help me to change my reservation which was booked last week?

ASSISTANT: Sure, can I know your name?

USER: My name is Emma Perez.

ASSISTANT: Ok, please wait.

USER: Sure, I will wait for your reply.

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

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us.