You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Can you please help me in changing my recent reservation details?

ASSISTANT: Sure, can I know your name please?

USER: Sure, my name is Thomas Adams.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found for the user name in our data base to change it.

USER: That's ok, thank you for giving the information anyways.

ASSISTANT: You are most welcome and thank you for reaching us.