You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Gregory King here.

ASSISTANT: How may I aid you?

USER: Can you please reserve a flight ticket from LAS to DCA to meet my grandparents in Washington?

ASSISTANT: Sure, tell me your travel dates please?

USER: Thank you for accepting my request, my departure is on Aug 18 and please book my return ticket also on Aug 20.

ASSISTANT: May I know your departure and return time please?

USER: I would like to return at evening time.

ASSISTANT: Do you have any other preferences?

USER: I will prefer single connection for my journey.

ASSISTANT: Please wait.

USER: Sure, take your time.

ASSISTANT: Thanks for your patience. I have found Delta airlines which flies with one connection. It departs at 01:00 AM and arrives at 02:00 AM.

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

ASSISTANT: Yes, I have confirmed your flight ticket with flight number 1026.

USER: Thank you for your great help.

ASSISTANT: Thank you.