You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

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

ASSISTANT: May I know on what dates would you like to travel?

USER: My travelling dates are from June 13 to June 15.

ASSISTANT: Do you have any other requirements to be met?

USER: I prefer normal cost airline to travel.

ASSISTANT: Can I have your name please?

USER: My name is Kenneth Mitchell.

ASSISTANT: Sorry to inform you that unfortunately there is no flights available by the given details.

USER: Ok, No issues, thank you.

ASSISTANT: Thank you.