You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, may I know how best I can help you today?

USER: Can you please help me with booking a flight ticket from PHL to DEN?

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: My travel dates are Sept 05 and 07.

ASSISTANT: Do you require any stopovers in your journey?

USER: I need a direct flight.

ASSISTANT:  Would you let us know if you have any other preferences?

USER: I prefer to travel in economy class.

ASSISTANT: May I know your name please?

USER: My name is Jacob Baker.

ASSISTANT: Ok, please stand by.

USER: Ok.

ASSISTANT: Thank you for being patient, we didn't find any flights which matches your requirement.

USER: That's ok, thank you.

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