You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: Samantha Thompson here, can you help me to change my reservation?

ASSISTANT: Sure, will you please give me a moment ?

USER: Sure, take your time.

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

USER: Ok, no problem. Thank you.

ASSISTANT: Welcome, have a great day.