You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you at this minute?

USER: Can you please make a reservation from DTW to BOS to go for shopping in Boston?

ASSISTANT: Sure, I am here to help you with that. Can I know your travelling dates?

USER: My journey dates are on July 19th and 21st.

ASSISTANT: Can I know your name?

USER: My name is Sharon Carter.

ASSISTANT: Do you have any other requirements?

USER: I don't have any other requirements.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: Sorry to say that, there are no flights available based on your travelling dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.