You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I assist you today?

USER: Owing to an emergency, I need to change my existing reservation.

ASSISTANT: Sure, may I know your name please?

USER: My name is Jack Phillips.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: We found a reservation on your name. Please mention your journey details?

USER: Please book a ticket from Houston, TX-IAH to Chicago, IL-ORD. Travelling dates are from 11/28 to 11/30.

ASSISTANT: Ok, please wait for a while.

USER: Sure. Please provide direct flight.

ASSISTANT: We found a connected flight with Hawaiian airlines, flight number 1018 and fare of 100. Direct flight not available.

USER: Please do not book ticket. Thanks.

ASSISTANT: Thank you for reaching us.