You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Alexander Martin.

ASSISTANT: How can I guide you today?

USER: I would like to book a flight ticket from OAK to DCA to meet my parents. Can you please help me with booking a flight ticket?

ASSISTANT: Sure, I am happy to help you. May I know you dates of journey?

USER: Sure, my travelling dates are Sep 22 and Sep 24.

ASSISTANT: Can I know your connection limit, please?

USER: Sure, I prefer to travel in a connecting flight.

ASSISTANT: Do you have any class preference for your journey?

USER: No, I am comfortable with any class.

ASSISTANT: May I know about your other specifications, if any?

USER: No, I do not have any other specifications.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Delta airlines is providing you the connecting flight in economy class, shall I reserve it?

USER: Yes, please proceed.

ASSISTANT: Your ticket has been reserved with flight 1005.

USER: Thank you for your assistance.

ASSISTANT: My pleasure.