You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Joseph Williams. I have planned for a family trip to Philadelphia and visit spruce street harbor, so could you please help me with booking a flight ticket with single connection?

ASSISTANT: Sure, may I know trip dates?

USER: Yes, my planned dates are 08/13 and 08/15.

ASSISTANT: Sure, may I know your airport codes?

USER: Yes, I will depart from CLT and land at PHL.

ASSISTANT: Hold on a minute.

USER: Ok.

ASSISTANT: Sorry, currently there are no flights available on your journey dates.

USER: No issues, thank you.

ASSISTANT: Thank you for reaching us.