You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Barbara Lopez here.

ASSISTANT: How can I help ypu?

USER: I have planned to visit Denver for a round trip, can you please reserve a flight ticket from DEN?

ASSISTANT: Ok, please provide me travelling dates.

USER: Sure, my departure is on July 17 and please book my return ticket also on July 19.

ASSISTANT: Do you need any requirements?

USER: Yes, I need single connection for my journey.

ASSISTANT: We found a flight in economy class with fare of 100. Shall I proceed?

USER: I am ok with this flight, you can proceed with booking now.

ASSISTANT: Your ticket is confirmed with JetBlue airline and flight number is 1002.

USER: Thank you for your assistance.

ASSISTANT: Thank you for reaching us.

USER: Welcome.