You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Cynthia Thomas here.

ASSISTANT: How can I be in your service?

USER: Can you help me to make a flight reservation from BOS to DTW?

ASSISTANT: Ok, please let me know the dates you have planned.

USER: My travelling dates are 07/15 and 07/17. Can you check is there any flight in the afternoon for DTW?

ASSISTANT: There is no flight available at your planned location to book.

USER: That's fine, thanks for your information.

ASSISTANT: Thank you for choosing our agency.