You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Can you help me to change my recent reservation which I had done last week?

ASSISTANT: Sure, can you please mention your name.

USER: Ok, please check for the name Ruth Edwards.

ASSISTANT: Please wait a moment.

USER: Ok, please take your own time.

ASSISTANT: Found your previous reservation, can you please mention your new airport codes?

USER: Pleased with the service provided, my new airport codes are LGA and destination code is MCO.

ASSISTANT: May I know your travelling dates?

USER: Ok, please check for the dates Feb 18 and 20th respectively.

ASSISTANT: Do you need any connection limit?

USER: Yes, I need a connecting flight.

ASSISTANT: Is there any other specifications to be met?

USER: No.

ASSISTANT:  Sorry, there are no flight tickets available with your requirements.

USER: That is ok, thank you for assisting me.

ASSISTANT: Thank you for reaching our service.