You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you today?

USER: Myself Rachel Roberts. Can you help me with changing my reservation to new travel dates?

ASSISTANT: Sure, please wait a moment.

USER: Sure, take your own time.

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

USER: It's ok, thanks for your information.

ASSISTANT: Thanks for reaching us.