You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I am Sandra Thompson, can you help me to change my reservation?

ASSISTANT: Sure, I will help you with that. Please give me a moment.

USER: Sure.

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

USER: No issues, thank you for your time.

ASSISTANT: Welcome, have a great day.