You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How may I help you?

USER: I want to modify my reservation, can you help me out?

ASSISTANT: Ok. Please provide your name?

USER: My name is Samantha Thompson.

ASSISTANT: No reservation found with name Samantha Thompson.

USER: That's ok, no problem. Thank you for your response.

ASSISTANT: Thanks.