You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: Can you help me to book a flight ticket from DCA to OAK?

ASSISTANT: When are you planning to travel?

USER: My planned travel dates are July 15 and July 17 respectively.

ASSISTANT: May I know your connection limit please?

USER: Yes, I need a connecting flight.

ASSISTANT: May I know your good name please?

USER: Sure, Patrick Walker.

ASSISTANT: May I know your other preferences?

USER: No, other preferences?

ASSISTANT: Patrick Walker,flight-1018 is available for you with 1 connection by American Airlines in economy class with depart time at 1:00 hours and return time at 10:00 hours. Can I book it for you?

USER: Yes, please book my ticket with this flight.

ASSISTANT: Your ticket is reserved, thank you for choosing us.

USER: Thank you for your help.

ASSISTANT: Have a nice day.