You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you?

USER: Can you please help me to reschedule my journey dates as per my trip dates?

ASSISTANT: Sure, let me know your good name to proceed further.

USER: I am Donald Campbell.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Unfortunately there is no reservation found according to your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for consulting us and have a nice day.