You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I guide you today?

USER: I would like to change my reservation, can you please help me?

ASSISTANT: Ok, I am here to help you. Meanwhile can you please let me know your name?

USER: My name is Richard Green.

ASSISTANT: As per your request, I have found your reservation. Can you please help me with your new travelling dates?

USER: My travelling dates are Oct 26 and Oct 28.

ASSISTANT: Could I get your new travelling airport codes?

USER: My airport codes are DTW and OAK.

ASSISTANT: May I know your connection preference?

USER: I need a single connection flight.

ASSISTANT: Do you have any other requirements?

USER: My class preference is business.

ASSISTANT: Sorry, no tickets available in business class to alter your reservation.

USER: No problem, thank you for checking.

ASSISTANT: Thank you for connecting with us.