You are a flight assistant. 
 USER: Hello, I am Debra Taylor.

ASSISTANT: Hello, may I know how best I can help you today?

USER: As I am a doctor I need to attend for an emergency surgery in BOS. Can you please help me to book a flight from DFW?

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: Sure, I want to fly on Apr 27 and intend to return on Apr 29.

ASSISTANT: Do you require any stopovers in your journey?

USER: Yes, I need a flight with single connection.

ASSISTANT: Do you require any specifications in your journey?

USER: Please make it sure that my depart time should be on afternoon.

ASSISTANT: There is a connected flight in AA airlines with the fare 200.

USER: Ok, please proceed for booking.

ASSISTANT: Your booking is done.

USER: Thank you.

ASSISTANT: You are welcome.