You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Due to my health problem I want to change my reservation, can you please help me to change my reservation?

ASSISTANT: Sure, please provide me your me your name?

USER: Myself Jack Edwards.

ASSISTANT: OK, we found a new reservation with your name.

USER: Ok.

ASSISTANT: Can you provide me your journey details.

USER: My travel dates are from 03/04 and 03/06. I would like to leave between JFK and LAS.

ASSISTANT: OK, please wait a minute.

USER: Ok.

ASSISTANT: We found 1006 UA airline with single connection and price of 200. Shall I proceed with booking?

USER: Ok, please book this ticket.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for reaching us.