You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you today?

USER: I would like to meet my cousin at Philadelphia, please help me in booking a ticket from DTW to PHL.

ASSISTANT: Sure, let me know your trip dates please?

USER: My planned trip dates are on Nov 15 and Nov 17.

ASSISTANT: Is there any airline preference?

USER: No, thank you for asking.

ASSISTANT: Would you like any break in between your journey?

USER: I need a break in between my journey.

ASSISTANT: May I know your preferable travel timings?

USER: I am fine with any timings.

ASSISTANT: Do you want to fly in economy class or business class?

USER: I am comfortable with any class.

ASSISTANT: Ok, can you mention your name to proceed further?

USER: My name is Elizabeth Edwards.

ASSISTANT: Sorry, no flights found as per your requirement.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for contacting us and have a nice day.