You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: Sandra Collins here. I want to reserve a ticket for my journey from DTW to BOS, can you please help me?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: My travelling dates will be from 03/25 to 03/27.

ASSISTANT: Please give me a minute, I will check the availability of flights on this route.

USER: Ok, please check with single connection flight.

ASSISTANT: Sorry, there is no flights available at your requested dates.

USER: Oh! That's fine, thank you for checking anyways.

ASSISTANT: Thank you for contacting us, have a nice day.

USER: Most welcome.