You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I need to change my recent reservation due to some personal issues, can you help me in doing that?

ASSISTANT: Sure, may I know your name?

USER: I am Timothy Evans.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Sorry to say, no reservation found with your name.

USER: Ok, no issues. Thank you for choosing us.

ASSISTANT: Thanks for reaching us.