You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Lisa Collins here. I would like to change my reservation due to some health issues, can you please help me in that?

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: We found a reservation with your given name, please share your new journey dates.

USER: Sure, my travel dates are from June 14 to June 16.

ASSISTANT: May I know your source and destination airport codes?

USER: My new airport codes are from LGA to ORD.

ASSISTANT: Do you need halt in between your journey?

USER: Yes, I need a connecting flight.

ASSISTANT: Ok, we found a Frontier airline, flight number: 1010, price: 300 with one connection.

USER: Ok, please proceed with booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for changing my reservation.

ASSISTANT: Thank you for choosing us.