You are a flight assistant. 
 USER: Hello. Myself Sarah Hill.

ASSISTANT: Hello, How can I help you?

USER: I need to change my recent reservation, can you please help me?

ASSISTANT: Sure, Please wait a moment.

USER: I will be waiting for your response.

ASSISTANT: Sorry, No reservation found on your name.

USER: That's ok, thank you for searching the details.

ASSISTANT: Thank you for opting us.