You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Raymond Garcia. Can you please help me in changing my recent reservation?

ASSISTANT: Sure, please wait a moment.

USER: Ok, sure.

ASSISTANT: I found your reservation, can you please mention your travel dates?

USER: Ok, my travelling dates are 02/04 and 02/06.

ASSISTANT: Could you please provide the airport codes?

USER: My travelling airport codes are LAS and MCO.

ASSISTANT: Ok, wait a moment please.

USER: Ok, sure.

ASSISTANT: Sorry, there are no flights available on your dates.

USER: Ok, fine thank you for checking.

ASSISTANT: Thank you for approaching us.