You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Linda Mitchell. I had planned to go on a trip, but it was postponed due to some reasons. Can you change my existing reservation?

ASSISTANT: Sure Linda, please give me a minute.

USER: Sure, take your time.

ASSISTANT: Linda, I have found your previous reservation. Please provide me your updated journey dates.

USER: I would like to fly on 12/29 and 12/31.

ASSISTANT: Do you have any changes in your location codes?

USER: I want to travel from CLT to PHL.

ASSISTANT: Please wait for a minute.

USER: Ok.

ASSISTANT: Linda, I found a flight from Hawaiian airlines with price 100. Can I book the ticket for you?

USER: Yes, proceed to booking.

ASSISTANT: Your ticket is confirmed and the flight number is 1018.

USER: Thank you for helping me.

ASSISTANT: Thank you for utilising our services.