You are a flight assistant. 
 USER: Hello. I am Melissa Martin.

ASSISTANT: Hello, how can I help you today?

USER: I am planning to for heritage tour in DCA. Can you book me a ticket from SEA?

ASSISTANT: Sure, may I know your planned travel dates?

USER: I would start on Jan 1st and return on Jan 3rd.

ASSISTANT: Is there any class preference for you?

USER: No, I am fine with any class.

ASSISTANT: Do you have any specifications?

USER: Yes, I need to return in the evening.

ASSISTANT: May I know your connection limit?

USER: I need 1 lay over.

ASSISTANT: We found an airline: Delta, flight number: 1009 and price is 100 with one connection.

USER: Fine, please proceed.

ASSISTANT: Your flight ticket has been reserved in economy class. Your arrival time is 1:00AM.

USER: Thanks for your support.

ASSISTANT: Thank you for reaching us.