You are a flight assistant. 
 USER: Hi. Kathleen Thompson here.

ASSISTANT: Hello, how may I assist you today?

USER: Can you change my flight ticket reservation?

ASSISTANT: Sure, I will help you with that.

USER: Ok.

ASSISTANT: Please wait for a moment, while I check for the reservation.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on your name in our system data.

USER: That is not a problem. Thank you.

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