You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Katherine Parker here.

ASSISTANT: How can I assist you?

USER: I want to travel from PHL to DCA. Will you help me with booking a flight ticket?

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

USER: My planned travel dates are from Feb 15 to Feb 17.

ASSISTANT: Ok, may I know your class preference?

USER: I am comfortable with any class.

ASSISTANT: Ok, do you have any other specifications?

USER: I need a connecting flight in my journey.

ASSISTANT: Ok, please wait for a while.

USER: Sure, I will wait for your response.

ASSISTANT: AA airlines is providing a flight on that route with ticket fare of 200, shall I proceed for booking?

USER: Ok, please confirm the ticket booking.

ASSISTANT: I have successfully booked your ticket with flight-1019, have a safe journey.

USER: Thank you for your help in booking my flight ticket.

ASSISTANT: Thank you for choosing us.