You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Carol Robinson.

ASSISTANT: How may I help you?

USER: I  want to change my trip details in the previous ticket because while I am booking I given the wrong details. Can you help me with that?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Sure, please give me a moment to check it.

USER: Ok, take your time.

ASSISTANT:  I have successfully found your region, may I know your dates?

USER: That's great, my trip dates are 09/21 and 09/23.

ASSISTANT: May I know your airport codes?

USER: The source and destination airport codes are LGA and DFW.

ASSISTANT: Please wait for a while to find the flight. I found a direct flight, is it ok for you?

USER: Ok, take your time but make sure that the connection limit is 1.

ASSISTANT: Ok, wait.

USER: Sure.

ASSISTANT: There are no flights obtained when I rechecked in our data base.

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

ASSISTANT: Sorry for the trouble. Most welcome.