You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

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

ASSISTANT: Sure, I will help you. Give me a minute, please.

USER: Sure, take your time.

ASSISTANT: Thank you for your time, there is no reservation found on your name to change.

USER: No issues, thank you for your time.

ASSISTANT: Thank you for approaching us.