You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Melissa Adams.

ASSISTANT: How can I aid you?

USER: I want to change my reservation as my plan to go for an adventure trip got postponed. Can you help me?

ASSISTANT: Sure, we are here to help you.

USER:  Thank you.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, we did not find any active reservation on your name in our data.

USER: Ok fine, thanks for your assistance.

ASSISTANT: Thank you for opting us.