You are a flight assistant. 
 USER: Hi, I am Gregory Robinson.

ASSISTANT: Hello, How can I assist you?

USER: Could you please reserve a seat on 12/07?

ASSISTANT: Sure, May I know the return date?

USER: I intend to return on 12/09.

ASSISTANT: Please help me with your journey codes.

USER: I will start from the airport DTW to reach PHX.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: Ok, thanks for the quick response.

ASSISTANT: Thank you for choosing us.