You are a flight assistant. 
 USER: Hello, I am Andrew Carter.

ASSISTANT: Hi,. How can I help you?

USER: As I am a doctor, I need to attend an emergency surgery in Philadelphia.

ASSISTANT: OK.

USER: Can you please book me a ticket with price range of 200?

ASSISTANT: Surely,will you provide your journey details?

USER: My airport codes are DC - DCA and PA - PHL. I start on 06/01 and return on 06/03.

ASSISTANT: Please wait a minute.

USER: I need a single connection. OK.

ASSISTANT: Thank you for your patience. We have found a flight having one connection with 100 cost. Spirit airline with 1004 flight number.

USER: You can proceed for booking.

ASSISTANT: Shall I proceed for booking? Your reservation has been confirmed.

USER: Thanks for the help.

ASSISTANT: Thank you for reaching us.