You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I would like to change my existing reservation which was made on the name of Paul Clark. Can you help me with it?

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: We found your reservation, please forward your travel details?

USER: My dates of journey are 08/10 and 08/12.

ASSISTANT: Ok, airport abbreviates please?

USER: They are from CLT to OAK.

ASSISTANT: 1005 flight in Spirit airline is available for you with a fare of 100. Shall I make it confirm?

USER: Yes please.

ASSISTANT: Ok, your booking has been confirmed. Thanks for approaching us.

USER: Thank you for helping me.