You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: Rachel Evans is here. Can you please help me in booking a flight ticket from PHL to BOS?

ASSISTANT: Can you please tell me your travelling dates?

USER: My travelling dates are Aug 29th and Aug 31st.

ASSISTANT: May I know your connection limit?

USER: Yes, I need a single connection.

ASSISTANT: Please let me know your class preference?

USER: I prefer to travel in an economy class.

ASSISTANT: Sorry, no flights found on your route.

USER: Ok, no worries at all. Thank you.

ASSISTANT: Thank you for reaching us.