You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: Could you please help me to update my travelling dates in my existing reservation as my trip dates got changes?

ASSISTANT: Sure, please share me your good name.

USER: I am Jeffery Harris.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry to say that, there is no active reservation found on your name.

USER: No issues.

ASSISTANT: Thank you for opting us.

USER: Thank you for your information.