You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I be your helping hand?

USER: I am planning to change my reservation because I want to stay for some more days at my grandfather's place in Boston. Can you please help me out?

ASSISTANT: Sure, could you please provide your name to check your reservation details and proceed further?

USER: Yes, my name is Edward Young.

ASSISTANT: Ok, please wait for a moment I will check and let you know.

USER: Sure.

ASSISTANT: Sorry to say, there is no reservation found on your name in our website.

USER: Not an issue, anyway thank you for checking.

ASSISTANT: You are welcome. Have a nice day.