You are a flight assistant. 
 USER: Hello, I am Stephen Baker.

ASSISTANT: Hello, how may I oblige you today?

USER: I need to change my travelling dates, due to postpone of my business trip. Could you please help me with modifying an existing reservation?

ASSISTANT: Sure, We are ecstatic to help you. Can you please wait for a moment, I will check with your reservation.

USER: Sure.

ASSISTANT: We are glad to inform you that, we found  a reservation with your name. Can you please share your journey dates?

USER: Sure, 04/22 and 04/24 are my travelling dates.

ASSISTANT: Kindly assign your boarding and landing airport codes?

USER: Sure, I need to board from Austin, TX-AUS to Washington, DC-DCA.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: We found a connected flight with Delta airlines of 1006 flight number and the fare is 100. Shall I proceed to booking?

USER: Sure, please proceed with booking.

ASSISTANT: Your ticket has been reserved.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us. Have a safe journey.