You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Jessica Scott. Actually, I am planning to change an reservation, due to some family function. Can you help me out?

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry Jessica Scott, there is no reservation found under your name.

USER: That's fine.

ASSISTANT: Thank you for reaching us.

USER: Thank you for help.