You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you at this moment?

USER: I want to change my existing reservation due to heavy rainfall in Denver. Can you help me out?

ASSISTANT: Sure, I will help you in changing your reservation.

USER: Thank you.

ASSISTANT: Can you please provide your name to check your reservation status?

USER: I am Ronald Jones.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Ronald Jones, I have found your reservation. Can you please provide your airport codes of journey?

USER: I will fly from IAH to DEN.

ASSISTANT: May I know your planned dates of journey please?

USER: My trip dates are Dec 14 and Dec 16.

ASSISTANT: Do you have any connection limit preference?

USER: Yes, I need a connecting flight.

ASSISTANT: Do you have any class preference for this trip?

USER: No, I am comfortable with any class.

ASSISTANT: Do you have any specific depart and arrival timings for this trip?

USER: No.

ASSISTANT: Do you have any airline preference for this trip?

USER: No.

ASSISTANT: Frontier Airlines is providing connecting flight on this route with a ticket fare of 100 and flight departs at 2:00 Hrs and arrives at 17:00 Hrs, shall I book your ticket in this flight?

USER: Please proceed.

ASSISTANT: Ronald Jones, your ticket is booked in economy class of flight number 1004.

USER: Thank you.

ASSISTANT: You are welcome and have a safe journey.