You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I am Joseph Clark.

ASSISTANT: Ok.

USER: I want to book a flight ticket from MI-DTW to MA-BOS. Can you help me with this?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: 12/17 and 12/19 are my travelling dates.

ASSISTANT: Do you have any specifications?

USER: I need a flight ticket within 500.

ASSISTANT: Ok, please wait for some time.

USER: Ok.

ASSISTANT: Thanks for waiting, there are no flights found with your specifications.

USER: No issue. Thank you.

ASSISTANT: Thank you for reaching us.