You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you at this moment?

USER: Can you help me in booking my flight ticket from IAD to PHX?

ASSISTANT: Sure, we are perky to assist you. Can you please share your travel dates that you have planned?

USER: My trip dates will be Dec 16th to Dec 18th.

ASSISTANT: Do you like to go with a economy class or business class?

USER: I prefer a economy class.

ASSISTANT: Do you need any flag stop in between journey?

USER: Yes, I prefer a connecting flight.

ASSISTANT: Is there any other specifications regarding your journey?

USER: My depart time is evening.

ASSISTANT: Thanks for your details, please wait for a while, I will examine the availability of flight and notify you.

USER: Sure.

ASSISTANT: May I know your good name please?

USER: I am Sarah Garcia.

ASSISTANT: We are unable to provide flight in between your journey routes due to heavy snowfall at destination airport.

USER: No problem, thank you for your assistance.

ASSISTANT: Thanks for reaching us, wish you a good day.