You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you now?

USER: I am Deborah Lee, I wan to change my reservation due to heavy rainfall at my place. Can you please modify my travelling dates?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

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: Ok, thank you for informing me.

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