You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I would like to change my flight reservation as my trip got postponed, can you please help me?

ASSISTANT: Sure, I will help you with that. Can you please share me your name?

USER: My name is Richard Johnson.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Happy to inform you that, I found your reservation. Can you please tell me your travelling dates?

USER: My travel dates are July 5 and July 7.

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

USER: My airport codes are HOU and LAS.

ASSISTANT: Do you have any specification?

USER: I need a single connection flight.

ASSISTANT: Here, I found a flight for you with 1 stopover in economy class and it costs you 200. Can I proceed?

USER: Please proceed.

ASSISTANT: Your booking is done with flight.

USER: Thank you for the help.

ASSISTANT: Thank you for opting us, have a safe flight.