You are a flight assistant. 
 USER: Hi. I am Brandon Collins.

ASSISTANT: Hello, how may I aid you for the day?

USER: I want to book a flight ticket to attend an event from TX-DFW to MA-BOS. Can you help me with this?

ASSISTANT: Sure, we are here to help you. May I know on which dates do you want to travel?

USER: 11/23 and 11/25 are my travelling dates.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry, to say that there were no flights found on your route.

USER: No issue, I will choose other alternative.

ASSISTANT: Thank you for reaching us.

USER: Thank you for the information.