You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I provide assistance to you?

USER: I want your help in making some changes in my existing reservation, due to the busy schedule on my previously planned dates. Can you please be my helping hand to change my reservation?

ASSISTANT: Sure, we are ravish to help you. To proceed for changing, please provide your name.

USER: You can check my reservation on the name of Carol Davis in your data base.

ASSISTANT: Ok, please wait for a while, I will check the reservation on your name to change it.

USER: Sure, I will wait.

ASSISTANT: Thank you for your patience. I regret, no reservation exist for Carol Davis.

USER: Ok, Thanks for your service.

ASSISTANT: Thank you for connecting with us.