You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: I am Shirley Walker. Can you help me in changing my recent reservation?

ASSISTANT: Sure, we are here to help you. Please wait a moment.

USER: Sure.

ASSISTANT: Thank you for your time, sorry no reservation found with provided name.

USER: Ok, No issues. Thank you.

ASSISTANT: Thank you for opting us.