You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Larry Wilson here. I would like to change my reservation due to my friend changed our trip to another location. Can you please help me with that?

ASSISTANT: Sure, please wait for a while.

USER: Ok, please take your time.

ASSISTANT: Sorry, no reservation found with your name to change the details.

USER: Oh! May be I am wrong. Anyway, thank you for your time.

ASSISTANT: Thank you for contacting us.