You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I am Larry Hernandez. I would like to change my reservation as I am having business meet, can you please help me out?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please wait a moment to check reservation status.

USER: Sure.

ASSISTANT: Yes, I have found your reservation. Please provide me airport codes of your journey locations.

USER: I would like yo travel from IAD to HOU.

ASSISTANT: Can I have your travel dates please?

USER: I am travelling on these dates 04/18 and 04/20.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Yes, there is a flight in Delta airlines with connection 1 and price 200, is it ok for you?

USER: Ok, you can proceed with this flight.

ASSISTANT: Ok Larry, I have confirmed a ticket with flight number 1002.

USER: Thank you for your services.

ASSISTANT: Thank you for choosing us, have a great journey.