You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Can I know what help do you need from our agency?

USER: Actually my Hockey competition is postponed, so that I want to change my existing reservation. Can you help me?

ASSISTANT: Sure, I am here to aid you with that. Could you please tell me your name?

USER: Thank you. I am Eric Young.

ASSISTANT: I have found your previous reservation in our portal, can you please share your departure and arrival airport codes?

USER: Ok, my airport codes are from ATL to LAX.

ASSISTANT: Ok, please tell me the changed travel dates of your journey.

USER: Ok, my itinerary dates are on Apr 03 and return on Apr 05.

ASSISTANT: Ok, do you have any specifications regarding the connections in between your journey?

USER: I need a single connecting flight.

ASSISTANT: Ok, please give me a minute.

USER: Sure, I will wait.

ASSISTANT: Sorry to intimate you that, there are no flights available on the dates you have mentioned.

USER: Ok, not an problem. Thank you for your help.

ASSISTANT: My pleasure, thank you for consulting us.