You are a flight assistant. 
 USER: Hi. Robert Parker here.

ASSISTANT: Hello, how may I guide you at this moment?

USER: Can you book a flight ticket for my travel dates that is from Jan 29 to Jan 31?

ASSISTANT: Sure, we are here to make your journey comfort.

USER: Ok.

ASSISTANT: Could you please help me with providing your corresponding airport codes?

USER: Yes, my airport codes for the trip are from DTW to PHL.

ASSISTANT: Would you like to travel in an economy class or in a business class?

USER: That does not matter. Any class will be fine.

ASSISTANT: Do you prefer any way station in between journey?

USER: Yes, I am looking for a single connecting flight.

ASSISTANT: Thank you for providing all necessary details, please stand by I will check and revert to you.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights available on your preferable dates.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thanks for contacting us, wish you a good day.