You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, What kind of help are you expecting from our side?

USER: Owing to an emergency, I want to change my existing reservation.

ASSISTANT: Sure, I can change your reservation right now. Before that I need to know your good name please?

USER: Sure, Helen Moore here.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: There is a reservation found on your name, To proceed further I need to know your airport codes?

USER: I want to travel from PHX to HOU.

ASSISTANT: Can you please share your travel dates that you have planned?

USER: Sure, my journey dates are Mar 4 and Mar 6.

ASSISTANT: Do you prefer any way station in between journey?

USER: I prefer maximum one connection.

ASSISTANT: Is there any other specifications regarding your journey?

USER: No.

ASSISTANT: We have found a direct flight with American airlines, flight number 1003 and the fare of 200. Would you like me to proceed next?

USER: Please proceed.

ASSISTANT: Sure, a seat has been reserved successfully for a economy class flight.

USER: Thank you for your assistance.

ASSISTANT: My pleasure, I hope you will enjoy this airline.