You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Rebecca Williams.

ASSISTANT: How can I assist you today?

USER: Please book me a ticket from DEN to EWR to meet my family.

ASSISTANT: Ok, please can I know the planned dates of your journey?

USER: I have planned to travel on 09/20 and 09/22.

ASSISTANT: Ok, please can I know the specification you are looking for?

USER: I prefer economy class.

ASSISTANT: There is a flight available with 1 connection limit and the airlines is UA. Can I book for the flight 1006?

USER: Ok, please book this ticket.

ASSISTANT: Ok, the flight ticket is confirmed and the class is economy. The departure time is 11:00AM and return time is 6:00AM.

USER: Thank you.