You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,. Any assistance required?

USER: My plan to visit Washington to meet my former colleague but due to some health issues I need to change an existing reservation, can you help me with that?

ASSISTANT: May I know your name?

USER: I am Laura Lee.

ASSISTANT: Ok. Reservation found.

USER: Ok.

ASSISTANT: Please help me with travelling airport codes?

USER: SEA-HOU are my new airport codes.

ASSISTANT: Please specify dates of travelling.

USER: My updated journey dates are on 01/23 to 01/25.

ASSISTANT: Flight can be booked with airline AA, flight number is 1002. Ticket price is 200 having connections 1.

USER: Ok, you can proceed with the booking.

ASSISTANT: Flight ticket is booked.

USER: Thanks for your assistance.

ASSISTANT: Thanks.