You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Can you please help me in booking a flight ticket to PHL from DFW?

ASSISTANT: Sure, can I have your planned trip dates please?

USER: My travel dates are from Jun 24 to Jun 26.

ASSISTANT: May I know your name please?

USER: I am Lisa Wilson.

ASSISTANT: Do you need a break in between your journey?

USER: I need a break in between my journey.

ASSISTANT: May I know your class preference?

USER: I am comfortable with any class.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: Lisa Wilson, no flights has been found on your planned trip dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.