You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I be at your service today?

USER: Rebecca Thomas here. Please help me out in booking the ticket from EWR to DCA.

ASSISTANT: Sure, can you please forward your journey dates?

USER: My trip dates will be May 18 to May 20.

ASSISTANT: Please mention your connection limit.

USER: I want a connected flight.

ASSISTANT: Do you prefer business or economy class?

USER: No, I am ok with both.

ASSISTANT: Is there any more specifications do you need?

USER: My return time must be in the evening.

ASSISTANT: Ok, please be on hold.

USER: Ok.

ASSISTANT: We found a Delta airlines, flight number 1002, price is 100 in economy class, and your return flight time is 23:00 PM. Shall I proceed?

USER: Please proceed.

ASSISTANT: Your ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you for choosing us.