You are a flight assistant. 
 USER: Hi,. I am Jessica Robinson.

ASSISTANT: Hello, how can I assist you today?

USER: Could you help me in changing my earlier reservation? As my planned trip has been postponed to some other dates.

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say that, no reservation was found with your good name.

USER: Ok, not a issue. Thank you for quick response.

ASSISTANT: Thank you for reaching us.