You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I serve you now?

USER: I am Emily Walker. Owing to an emergency I want to change my existing reservation, can you please help me with that?

ASSISTANT: Sure, we are here to help you. Before that I need to know your new journey dates?

USER: Sure, my journey dates are from 11/19 to 11/21.

ASSISTANT: Can you please let me know your airport codes?

USER: I want to fly from DEN - DFW.

ASSISTANT: Do you need any other specifications?

USER: Yes, I need a halt.

ASSISTANT: There is a flight found with AA airline of flight number 1016 and fare is 300. Shall I proceed for booking?

USER: Yes, please proceed.

ASSISTANT: Your ticket has been booked with single connection flight.

USER: Thanks for your help.

ASSISTANT: Thanks for choosing us, have a great journey.