You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Can you help me in booking from PHL to ORD?

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

USER: My trip dates are Jun 19 to Jun 21.

ASSISTANT: Ok, please mention your name.

USER: I am Sarah Campbell.

ASSISTANT: Let me know your connection limit.

USER: I am looking for a direct flight.

ASSISTANT: Do you have any specification?

USER: No.

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

USER: No issue, thank you.

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