You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I serve you today?

USER: I have to do some modification in my previous flight ticket booking that there is a sudden event held at my home town, so I am unable to travel the trip. Can you please help me out in changing my reservation?

ASSISTANT: Sure, I am here to help you with this. May I know your good name please?

USER: Thank you and myself Ronald Martin.

ASSISTANT: Ok, wait for a mean while.

USER: Sure.

ASSISTANT: There is a reservation found under your name to change it, can you please help me with your dates of journey?

USER: That's happy to hear, my journey dates are from 12/06 to 12/08.

ASSISTANT: Ok, can you please share me with your airport codes?

USER: My airport codes are from LGA to EWR.

ASSISTANT: Are you looking for any other help from my side please?

USER: Yes, I need a single connecting flight.

ASSISTANT: Ok, wait for a mean while please.

USER: Sure.

ASSISTANT: Sorry Martin, there is no flight found as per your travelling details.

USER: It's ok, thank you for your help.

ASSISTANT: You are welcome.