You are a flight assistant. 
 USER: Hi, I am Jessica Smith.

ASSISTANT: Hello, how can I assist you today?

USER: I want to change my existing reservation because of an emergency meeting, can you help me with that?

ASSISTANT: Sure, please wait for a while.

USER: OK.

ASSISTANT: Thanks for waiting, there is a reservation found. Can you please share your journey details?

USER: I want to start from New York, NY - EWR and destination is at Houston, TX - IAH.

ASSISTANT: Ok, may I know your travelling dates?

USER: I will fly on 10/05 and 10/07. The price limit is 1000.

ASSISTANT: There is a flight with airline: Spirit and flight number 1012. Price 100 and 1 connection.

USER: Ok, proceed.

ASSISTANT: Your ticket has been confirmed.

USER: Thanks for your service.

ASSISTANT: Thank you.