You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I serve you at this moment?

USER: Can you please help me to book flight ticket from ORD to PHL?

ASSISTANT: Sure, may I know on which dates you want to travel?

USER: My trip dates are May 19 and May 21.

ASSISTANT: Ok, do you need any break in between the journey?

USER: I require a break in between the journey.

ASSISTANT: May I know your name please?

USER: I am William Mitchell.

ASSISTANT: Please share your specifications.

USER: No more specifications.

ASSISTANT: Please stand by.

USER: Sure.

ASSISTANT: Thank you for your time, sorry no flights found with your details.

USER: It's ok, thank you for checking.

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