You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Can you help me to change my reservation to next week?

ASSISTANT: Sure, may I know your good name?

USER: My name is Donald Collins.

ASSISTANT: Please wait for a moment.

USER: Sure, take your time.

ASSISTANT: We found a reservation on your good name. May I know your planned travel dates?

USER: My travelling dates are Apr 21 and 23.

ASSISTANT: Please share me your source and destination points.

USER: My airport codes are MSP and DCA.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight for this trip.

ASSISTANT: Is there any class preference for you?

USER: No.

ASSISTANT: We found an airline: Spirit, flight number: 1021 and price is 100 with one connection.

USER: Proceed with booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.