You are a flight assistant. 
 USER: Hello,. I am Sharon Johnson.

ASSISTANT: Hello, how may I help you?

USER: I want to book a flight ticket to visit Arizon Desert in Phoenix, AZ - PHX. Can you please book a flight ticket from Detroit, MI - DTW?

ASSISTANT: Sure, can you please share me your budget for plane ticket?

USER: I can afford up to 1000.

ASSISTANT: May I know your departure and arrival dates?

USER: My trip dates are 09/19 - 09/21.

ASSISTANT: Unfortunately there is no flights found with your given details.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for choosing us.