You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you?

USER: I want to attend my sister's marriage ceremony at Chicago, can you please help me to book a ticket?

ASSISTANT: Sure, can you please tell me your airport codes?

USER: I am looking for tickets from BOS to ORD.

ASSISTANT: Ok, may I know your travelling dates?

USER: I am planning to start on 08/17 and return on 08/19.

ASSISTANT: The Delta airline with flight number 1022 is available having price as 300 and connection as 1. Shall I proceed booking?

USER: Yes, you can proceed ahead.

ASSISTANT: Ok. Your flight ticket is booked.

USER: Thank you for booking my ticket instantly.

ASSISTANT: May I know your name please?

USER: Yes, my name is David Garcia.

ASSISTANT: Thank you for choosing us.

USER: Welcome.