You are a flight assistant. 
 USER: Hello. I am Donna Thompson.

ASSISTANT: Hello, how can I serve you today?

USER: I am planning to go for Outdoor Trivia race, can you please book a ticket to Dallas, DFW?

ASSISTANT: Sure, please share me your source airport code?

USER: Boarding point is Detroit, DTW.

ASSISTANT: Do you need any halt in between the journey?

USER: I need connecting flight.

ASSISTANT: Please mention the journey dates?

USER: My trip dates are 08/16 to 08/18.

ASSISTANT: Please also share the budget for flight ticket?

USER: Price limit is 500.

ASSISTANT: Thanks for details, there is no flight available on your given journey data.

USER: Ok. Thank you.

ASSISTANT: Thank you for reaching us, we hope see you again.