You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Sarah Wright, want to alter my reservation dates. Can you please help me in this?

ASSISTANT: Sure, I will help you with that. Please wait for a moment, while I check for the reservation.

USER: Ok.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on your given name.

USER: It's ok, thank you.

ASSISTANT: Thank you for visiting us, we hope see you again.