You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Lisa Mitchell. Can you help me to book a flight ticket in my preferable dates Sept, 26 and Sept, 28?

ASSISTANT: Sure, I am here to help you out with booking. Can you please share your airport codes?

USER: My source and destination airport codes are BOS and DEN.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Delta airlines is having a connecting flight with a fare of 200, shall I proceed with booking?

USER: Please proceed.

ASSISTANT: Your ticket is confirmed with the flight-1013.

USER: Thank you.

ASSISTANT: Welcome, have a safe journey.