You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Amy Young here.

ASSISTANT: How can I help you?

USER: I would like to change my trip location because of my health checkup in Las Vegas, can you help me?

ASSISTANT: Sure, please wait a while.

USER: Please help me with changing my reservation. I will be waiting for your response.

ASSISTANT: Sorry to say, there is no reservation on your name in our database.

USER: Oh! That's very sad to now. Anyways, thank you for checking.

ASSISTANT: Thank you for opting us.

USER: You are most welcome.