You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I am Andrew Scott, can you help me to book a flight from DFW to BOS?

ASSISTANT: Let me know your travel dates.

USER: My travelling dates are May 28 and 30.

ASSISTANT: Do you have any preference?

USER: I need a connecting flight.

ASSISTANT: Sorry, no flights found for your travelling dates.

USER: No issues, thank you for your time.

ASSISTANT: Thank you.