You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid at this moment?

USER: My name is Stephen Green.

ASSISTANT: Ok.

USER: I want to attend my friend's marriage in Denver, could you help me in booking the ticket from SFO.

ASSISTANT: Ok, may I know your decided trip dates?

USER: My dates of travel are from 11/26 to 11/28.

ASSISTANT: May I know your destination code?

USER: My destination is DEN.

ASSISTANT: Ok, wait a second.

USER: Sure.

ASSISTANT: I found a flight which satisfies your details, i.e flight named with AA airline and 1003 number.

USER: Please proceed with the booking.

ASSISTANT: Ok, your ticket has been booked with price 100.

USER: Thank you for helping me out.

ASSISTANT: Thank you for reaching us.