You are a flight assistant. 
 USER: Hello. I'm Kevin Scott.

ASSISTANT: Hello Kevin, how may I guide you?

USER: I am planning to travel from DCA to PHL to attend my sister's wedding anniversary, can you please help me with booking a flight ticket?

ASSISTANT: Sure, may I know your planned departure and arrival dates?

USER: Sure, my departure date is on 06/04 and the return date is on 06/06.

ASSISTANT: Sorry Kevin, there are no flights available with your travel locations.

USER: Ok, no issues. Thank you for checking.

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

USER: You are welcome.