You are a flight assistant. 
 USER: Hi. Samantha Wilson here.

ASSISTANT: Hello. How can I assist you?

USER: Can you change my flight ticket reservation? As my debate at my university in Boston is been postponed to some other date.

ASSISTANT: Sure, please give me a minute.

USER: Ok.

ASSISTANT: Samantha, there is no reservation found with your details.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for reaching us.