You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself David Thompson.

ASSISTANT: How can I assist you today?

USER: I am planning my weekend to visit Seattle to meet my grand children's. Can you please help me in reserving the ticket from DCA to SEA?

ASSISTANT: Sure, I can help you with that. May I know your planned travel dates please?

USER: I am willing to leave on Aug 16th and again I will retrieve on Aug 18th.

ASSISTANT: May I know your class preference please?

USER: I am comfort with any class.

ASSISTANT: Ok, please let me know if you have any other specifications.

USER: I am flexible with single connection.

ASSISTANT: American airlines is providing a flight on that route with ticket fare of 100 and 1 connection, shall I proceed for booking?

USER: Yes, I think that can work for me. Please go ahead and reserve the ticket.

ASSISTANT: I have successfully booked you an economy class ticket in flight-1027, have a safe journey.

USER: Thank you very much for reserving the ticket.

ASSISTANT: Thank you for choosing us.

USER: You are welcome.