You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: Can you please help me with changing my recent reservation?

ASSISTANT:     Sure, I am here to help you. May I know your name please?

USER: My name is Emily White.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Thank you for waiting, we found a reservation on your name. Can you please share your travelling dates?

USER: My travel dates are Mar 02 and 04.

ASSISTANT: Ok, may I know your airport codes please?

USER: Airport codes are SEA and IAD.

ASSISTANT: Ok, do have class preference?

USER: I prefer business class.

ASSISTANT: Ok, can I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Please share your other preferences.

USER: I would like to depart at evening.

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT: Thank you for waiting, sorry no flights found with your details.

USER: That's ok, thanks for the help.

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