You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: William King here.

ASSISTANT: How can I aid you at this moment?

USER: Due to sudden change in my planned date of journey, I would like to change my reservation. Can you please help me out with that?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please wait a moment, I will check your reservation status.

USER: Sure, take your time.

ASSISTANT: I have found your reservation. Can you please mention your new travel dates for booking flight ticket?

USER: That's great, I am planning to move on 05/26 and please book my return ticket on 05/28.

ASSISTANT: May I know your preferable airport code names for further process?

USER: Sure, I will prefer LGA and IAH as my origin and destination airport codes to my journey.

ASSISTANT: Please wait a moment, I will check flight availability in this route as per your requested dates.

USER: Ok, take your time.

ASSISTANT: Based on your information, Southwest airline is ready to serve you with 1 connection with a minimum fare of 100 is available for you. Shall I proceed with this?

USER: That's fine for me, you can proceed with booking.

ASSISTANT: Your flight ticket is booked successfully, flight number is 1019. Thank you for reaching us, have a good day.

USER: Thank you for your help in booking of my ticket, have a great day.

ASSISTANT: Most welcome.