You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: I am Robert Thomas, can you help me in booking my flight ticket to IAD from DEN?

ASSISTANT: Sure, I am glad to help you with that. Can you please provide your preferable dates of travelling?

USER: Thank you for considering my request. My preferable travelling dates are Apr 28 and Apr 30.

ASSISTANT: Do you have any class preference?

USER: I am comfortable with any of the class.

ASSISTANT: At what time are you planning to depart and return?

USER: I have planned my departure in the evening and I have not yet planned my arrival time.

ASSISTANT: Please wait a moment to check the flights on your rout meanwhile if you have any other specifications please let me know.

USER: Sure, I will wait for your response and I need a connecting flight for my journey.

ASSISTANT: Based on your information, I have found a flight with 1 connection having with the fare of 100 provided by AA airlines in economy class. Are you ok with this flight?

USER: Yes, I am ok with the flight which you have provided go ahead with the booking.

ASSISTANT: Ok, your ticket has been confirmed in flight number 1013.

USER: Thank you for booking my flight ticket with the flight 1013.

ASSISTANT: Thank you for reaching us, have a great day.