You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to book a flight ticket from CLT to BOS to meet my friends. Can you please help me with booking a flight ticket?

ASSISTANT: Can I know your travel dates?

USER: My travelling dates are Apr 10 and Apr 12.

ASSISTANT: Do you have any preference?

USER: Yes, prefer to travel in a normal cost airline.

ASSISTANT: Let me know your name.

USER: I am Jennifer Lee.

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

USER: No worries, thank you for the information.

ASSISTANT: Thank you.