You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Frank Mitchell here.

ASSISTANT: How can I aid you?

USER: Can you book a flight ticket for my airport codes that is from ORD to DTW?

ASSISTANT: Sure, We are here to help you. Can I know your travelling dates?

USER: The travel dates are from 29 Dec to 31 Dec.

ASSISTANT: Do you need any break?

USER: I  prefer a stopover flight.

ASSISTANT: Is there any other specifications?

USER: The depart time would be in the morning.

ASSISTANT: May I know your name?

USER: I am Frank Mitchell.

ASSISTANT: Please wait a while.

USER: I prefer a normal cost airline.

ASSISTANT: Ok. Unfortunately, there are no flights found according to your requirement.

USER: Not a problem. Thank you.

ASSISTANT: Thank you for opting us.