You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Brenda Nelson here. I would like to amend my existing reservation which I have done last week. Can you please assist me about it?

ASSISTANT: Sure Brenda. Please give me a minute.

USER: Ok, sure.

ASSISTANT: Brenda, I have found an existing reservation with your details. Please provide me your updated dates.

USER: Ok, my updates dates are 01/05 and 01/07.

ASSISTANT: Do you want to change the source and destination?

USER: My source and destination is CLT and PHL.

ASSISTANT: Please give me a minute.

USER: Ok, please make sure connection limit should not exceed 0.

ASSISTANT: There are no flights available with 0 connection.

USER: Not an issue, thank you for the information.

ASSISTANT: Thank you for choosing us, have a good day.