You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I am planning to change my reservation, can you help me in that?

ASSISTANT: Sure, kindly share your name.

USER: I am Raymond Taylor.

ASSISTANT: Please wait a moment.

USER: Ok.

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

USER: That's ok, thank you.

ASSISTANT: Thanks for reaching us.