You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please help me to change my travel dates in my recent reservation?

ASSISTANT: Sure, may I know your good name?

USER: Thank you. I am Steven Allen.

ASSISTANT: We found a reservation on your name, can you please share your new travel dates?

USER: That's great, my new travel dates are Aug 25 and Aug 27.

ASSISTANT: May I know your airport codes?

USER: My source and destination airport codes are PHL and SFO.

ASSISTANT: Do you have any preferences?

USER: I am looking for a single connecting flight.

ASSISTANT: We found a connecting flight 1000 from Spirit airline has fare 100. Shall I proceed?

USER: Yes, please proceed with the ticket booking.

ASSISTANT: Your reservation has been changed successfully.

USER: Thank you so much for your help.

ASSISTANT: Thank you for opting us.

USER: You are welcome.