You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Virginia Campbell.

ASSISTANT: How can I help you today?

USER: I want to change my existing reservation, due to some health issue. Can you please help me out?

ASSISTANT: Sure, I am glad to help you to change your reservation.

USER: Thank you.

ASSISTANT: Happy to inform you that, I found your reservation. Can you please share your travel dates?

USER: My travelling dates are 07/24 and 07/26.

ASSISTANT: Ok, may I know your travelling airport codes?

USER: My travelling airport codes are EWR and IAH.

ASSISTANT: Please wait a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Flight 1021 in Hawaiian airlines is available for you with 1 stopover and it costs you 200. Can I proceed?

USER: Ok, please proceed for booking.

ASSISTANT: Your booking is done.

USER: Thank you for booking.

ASSISTANT: Thank you for reaching us.