You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Deborah Thompson. I want to do some modifications in my previous reservation, due to some health issue. Can you please help me out?

ASSISTANT: Sure, I will help you to change your reservation.

USER: Thank you.

ASSISTANT: I found your reservation, can you please share me your travelling dates?

USER: My travelling dates are from 12/29  till 12/31.

ASSISTANT: Ok, may I know your airport codes?

USER: My travelling airport codes are from SFO to ORD.

ASSISTANT: Here, I found a flight for you with single connection.

USER: Please proceed.

ASSISTANT: Your ticket is booked with flight number 1010 and airline is UA.

USER: Thank you for booking.

ASSISTANT: Welcome, have a safe flight.