You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: I would like to change my planned dates to some other date. Please help me in changing my existing reservation.

ASSISTANT: Sure, I will help you with that. May I know your good name?

USER: My name is Stephanie Jackson.

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

USER: Sure, take your time.

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

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for visiting us, have a nice day ahead.