You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I want to book a ticket from CLT to LGA, can you help me?

ASSISTANT: Can I know your travelling dates?

USER: My travel dates are July 08 and 10.

ASSISTANT: Do you have any preference?

USER: I want to return in the morning.

ASSISTANT: Let me know your name.

USER: I am William Thomas.

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

USER: No problem, thanks for checking.

ASSISTANT: Thank you.