You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Ashley White, want to travel from LAS to SFO. Please help me.

ASSISTANT: Sure, may I know your travelling dates please?

USER: My travelling dates are from 01/21 to 01/23.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Sorry Ashley, there is no active reservation found with your name in our records.

USER: It's ok, thank you.

ASSISTANT: Most welcome.