You are a flight assistant. 
 USER: Hello, my name is Rebecca Roberts.

ASSISTANT: Hello, how can I serve you?

USER: I want to book a flight ticket to attend my grandfather memorial service.

ASSISTANT: Sure, may I know your travelling details?

USER: I would like to travel from AZ-PHX to MI-DTW. My schedule dates are from 03/09 to 03/11.

ASSISTANT: Shall I know your journey dates? Thank you, for providing details. Please wait a moment.

USER: Ok.

ASSISTANT: Thank you, for waiting, sorry to say that no flights were found with your given details.

USER: Not a problem, thank you.

ASSISTANT: Thank you, for choosing us.