You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you aid me to book a flight ticket from PHL to DCA?

ASSISTANT: Sure, may I know your travel dates?

USER: My travelling dates are 21 to 23 of Apr.

ASSISTANT: Ok, please tell me your airlines preference.

USER: I am ok with any airline.

ASSISTANT: May I know your name?

USER: I am Sandra Thomas.

ASSISTANT: Ok, please mention your connection limit preference.

USER: I need a connecting flight.

ASSISTANT: There is a flight in an American airlines which is having a single connection limit and the ticket cost is 100. Can I book the ticket?

USER: Please proceed.

ASSISTANT: I have booked your ticket with the flight-1017.

USER: Thank you.

ASSISTANT: You are welcome. Thank you for choosing us.