You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you now?

USER: Can you please change my recent reservation? As my planned trip has been postponed to some other dates.

ASSISTANT: Sure, I will help you with that.

USER: Thanks for that.

ASSISTANT: May I know your good name?

USER: My name is Jacob Thomas.

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

USER: Sure, I'll wait for your response.

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

USER: Oh! That's ok, thank you for giving the information anyways.

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