You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I asssit you today?

USER: I am Melissa Thompson. I am planning to change my reservation to another destination, so can you help me to change my reservation?

ASSISTANT: Sure, I am here to help you, please wait for a minute.

USER: Ok.

ASSISTANT: Sorry, I could not find any reservation with your name.

USER: That's ok, thank you.

ASSISTANT: My pleasure.