You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to change my reservation as my exams got postponed to another date. Can you please help me in changing?

ASSISTANT: Sure, I can change your reservation right now. Before that I need to know your good name please?

USER: Sure, I am Alexander Edwards.

ASSISTANT: Can you please share me your new journey dates?

USER: My new journey dates are from 05/19 to 05/21.

ASSISTANT: May I know your airport codes?

USER: My airport codes are from LGA to DCA.

ASSISTANT: Do you need any other specifications?

USER: I need a connecting flight. Price limit is 1000.

ASSISTANT: There is a flight found with Spirit airline of flight number 1000 and fare is 200. Shall I proceed for booking?

USER: You can proceed with booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thanks for connecting us, wish you a happy journey.