You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I want to change my travel dates in my previous reservation so can you please help me with that?

ASSISTANT: Sure, we are here to help you.

USER: Thank you for your response.

ASSISTANT: May I know your name please to proceed further?

USER: My name is Cynthia Martin.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: I found your reservation, could you please share me your new airport codes?

USER: My airport codes are PHL and ATL.

ASSISTANT: Let me know your new travel dates please?

USER: I want to take off on Oct 03 and book my return ticket also on Oct 05.

ASSISTANT: May I know your connection limit?

USER: I want a direct flight.

ASSISTANT: Do you have any class preference?

USER: I want to travel in economy class flight so please check with this details.

ASSISTANT: Sure, may I know your name please to proceed further?

USER: I already mentioned my name.

ASSISTANT: Sorry to inform you that there are no flight services available on your given dates.

USER: It's ok no problem. Thank you for your information.

ASSISTANT: Thanks for contacting us.