You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My name is Emily Lewis, can you please help me in changing my existing reservation details?

ASSISTANT: Sure, I will help you.

USER: Thanks.

ASSISTANT: There is reservation on your name, may I know your desired travel dates please?

USER: My trip dates are from 03/26 to 03/28.

ASSISTANT: Can you I know your airport codes please?

USER: Ok, my airport codes are from DCA to AUS.

ASSISTANT: Please wait a while.

USER: Ok.

ASSISTANT: There is a flight with connection limit 1 and fare 100, shall I proceed for booking?

USER: Ok, please proceed and confirm my reservation.

ASSISTANT: Your ticket is booked, flight number 1002.

USER: Thank you so much.

ASSISTANT: Thank you for opting us.