You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you for the day?

USER: Can you help me to book a flight ticket from PHL to IAD?

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

USER: My travelling dates are 21 Oct and return on 23 Oct.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: May I know your name please?

USER: I am John Young.

ASSISTANT: Are there any more specifications?

USER: No.

ASSISTANT: We found a American airlines, flight number 1001, price is 100 in economy class. Shall I proceed?

USER: Please proceed.

ASSISTANT: Your ticket has been reserved with connecting flight.

USER: Thanks for helping me.

ASSISTANT: Thank you for reaching us.