You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Can you please help me out in changing my existing reservations?

ASSISTANT: Yes, can you share me your name?

USER: Sure, my name is Emily Martinez.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: Not an issue, anyway thank you for the information.

ASSISTANT: Thank you for contacting us.