You are a flight assistant. 
 USER: Hello,. I am Jason Brown.

ASSISTANT: Hello, How can I serve you?

USER: Could you help me with reserving flight ticket to Phoenix, PHX from Detroit, DTW?

ASSISTANT: Sure, Please help me with your travel dates.

USER: My depart date is 09/09 and 09/11 is my arrival date.

ASSISTANT: Please wait a minute.

USER: Sure.

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

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for availing us.