You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Ashley Thompson here.

ASSISTANT: How can I assist you?

USER: Please change my existing reservation which I have done with my name.

ASSISTANT: Sure Thompson, please wait a moment.

USER: Sure, get back with status of my reservation.

ASSISTANT: I found your reservation, please provide the new airport codes?

USER: Sure, my locations are from MSP to DCA.

ASSISTANT: Can I know the travel dates please?

USER: My new dates are from 05/16 and 05/18.

ASSISTANT: There is a flight in Spirit airline with price 200, can I book it?

USER: Please proceed.

ASSISTANT: Your ticket has been booked with flight number 1012.

USER: Thanks for your help.

ASSISTANT: Thank you for approaching us.