You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you today?

USER: Owing to emergency, I need to change my recent reservation. Please help me in that.

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Can I know your name to check your previous reservation?

USER: My name is Ruth Nelson.

ASSISTANT: Yes, I have found your reservation with your name. Can you please provide your new journey airport codes?

USER: My source airport code is CLT and destination airport code is ORD.

ASSISTANT: Ok, may I know your departure and return dates of travelling?

USER: My travel dates are from May, 26 to May, 28.

ASSISTANT: Any connection limit do you have?

USER: I need a single connecting flight.

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

USER: No.

ASSISTANT: Do you have any airline preference?

USER: I prefer normal-cost airlines.

ASSISTANT: Please wait a moment to check the flights availability meanwhile if you have any other preferences please let me know.

USER: Ok. I need an economy class to fly.

ASSISTANT: Sure. I have found a flight within your limitations having with the fare of 100 provided by Delta airlines in economy class. Are you ok with this flight?

USER: Please proceed.

ASSISTANT: Ok, your ticket has been confirmed in flight number 1019.

USER: Thank you for booking.

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