You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I need your help in changing my travel dates in my previous reservation so can you please help me with that?

ASSISTANT: Yes, can you please share your name for checking?

USER: Thank you for your response. My name is Scott Martinez.

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

USER: It's ok no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.