You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you for the day?

USER: I am Karen Hall, want to change my reservation dates. Can you help me?

ASSISTANT: Sure, I am here to help you with that changing.

USER: Thanks.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting.

USER: It's ok.

ASSISTANT: There is a reservation found with your name in our database. Can you please provide your new preferable airport codes?

USER: My airport codes are from DEN to SEA.

ASSISTANT: May I know your new travelling dates, please?

USER: My travelling dates are from 01/21 to 01/23.

ASSISTANT: Do you have any specification?

USER: Yes, I want single connection.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Karen Hall, I have found a flight in AA airline with connecting and with a fare of 100. Shall I proceed to booking?

USER: Please proceed.

ASSISTANT: Your booking has been done with the flight number 1023.

USER: Thank you.

ASSISTANT: You are welcome, thank you for approaching us.