You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I want to change my existing reservation, can you help me?

ASSISTANT: Sure, please provide me your name?

USER: Davis Clark is my name.

ASSISTANT: We found a new reservation, could you please sha. Could you please share me your travelling details?

USER: Travel dates are 01/25 and 01/27. Journey points are ORD and JFK.

ASSISTANT: Thanks for your details, we found 1008 Delta airline with single connection and price of 100. Shall I proceed with booking?

USER: Proceed.

ASSISTANT: Your ticket has been booked.

USER: Thanks.

ASSISTANT: Thank you for reaching us.