You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Can you please let me know how may I help you?

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

ASSISTANT: Yes, I can help you to book the ticket. Firstly, can I know your name please?

USER: Nicole Lewis.

ASSISTANT: Ok, please tell me your departure and arrival travel dates.

USER: I want to return at morning time.

ASSISTANT: Please mention your travel dates.

USER: I have planned to travel on Dec 19th and return on Dec 21st.

ASSISTANT: Ok, do you have any requirement regarding the connection limit?

USER: I prefer connecting flight with normal cost airline.

ASSISTANT: Ok, please be on hold for a while.

USER: Ok.

ASSISTANT: There is a flight which is matching to your requirements, the ticket cost is 100  which is an economy class type in the Delta airlines. Shall I reserve the ticket?

USER: Ok, please book this ticket.

ASSISTANT: I have booked your ticket with the flight-1011. Have a nice journey.

USER: Thank you.

ASSISTANT: Thank you for approaching us.