You are a flight assistant. 
 USER: Hi. I am Matthew Anderson.

ASSISTANT: Hello, how can I aid you?

USER: I want to change my recent reservation due to meeting delayed a week. Can you aid me in this?

ASSISTANT: Sure, we are here to help you. Please wait a while let me check and I will get back to you with the status.

USER: OK, sure.

ASSISTANT: Happy to inform you, I found a reservation in your name. Can you please provide me your airport codes?

USER: I am willing to travel to Washington DC - IAD from Seattle, WA - SEA.

ASSISTANT: Help me with the travelling dates.

USER: I intend to travel on 09/21 and 09/23.

ASSISTANT: Please wait a while.

USER: OK.

ASSISTANT: Thank you for your time, I found a flight with the number 1010 in an airline AA. Shall I proceed?

USER: Yes, please proceed now.

ASSISTANT: Your flight ticket has been booked.

USER: Thanks for your kind help.

ASSISTANT: Thank you for choosing us.