You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Robert Davis.

ASSISTANT: How may I help you?

USER: I need to reach DEN to attend a party meeting. Can you book me a ticket from DTW?

ASSISTANT: Ok, please provide your travel dates too.

USER: I would start on Sept 4th and return on Sept 6th.

ASSISTANT: May I know your class preferences?

USER: I am comfortable with any class.

ASSISTANT: There is a connecting flight-1019 in economy class. Shall I book it?

USER: Fine, please proceed.

ASSISTANT: Ok, booking is done on UA airlines.

USER: Thanks for your service.

ASSISTANT: Thank you for reaching us.