You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: I have postponed my trip due to some important work. So, I need to modify the travel details in the recent ticket. Can you please help me to do that?

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

USER: Thank you for your quick response. My name is Matthew Nelson.

ASSISTANT: Ok, please wait a minute.

USER: Ok, I will wait for your reply. Take your time.

ASSISTANT: Thanks for waiting, there is no active reservation on your name.

USER: It's ok, not a problem with that. Thank you for your time.

ASSISTANT: Thank you.