You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Gregory Thompson. Could you please help me with booking a flight ticket from SFO to DEN?

ASSISTANT: Ok, may I know your travelling dates?

USER: I would like to depart on May 13th and return on May 15th.

ASSISTANT: Do you have any preference?

USER: I am looking for a connecting flight.

ASSISTANT: There is a connecting flight with fare 300 and 1025 as flight number. Shall I proceed with booking?

USER: Please confirm the booking.

ASSISTANT: Ok, your ticket is confirmed.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us.