You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I am looking for a flight from LAS to PHL, can you help me out?

ASSISTANT: Sure, I am here to help you in booking. Can you please share your travel dates?

USER: My trip dates are from Jul 19th till Jul 21st.

ASSISTANT: Ok, please share me your name.

USER: Myself Emma Turner.

ASSISTANT: Do you have any specification?

USER: I would like to start my journey in afternoon.

ASSISTANT: Sorry, no flights are available on your preferable travel dates.

USER: That's ok, not an issue. Thank you.

ASSISTANT: Thank you for reaching us, have a nice day.