You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

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

ASSISTANT: What type of service you are expecting from us? May I know your name?

USER: Thank you for your response. my name is Pamela Collins.

ASSISTANT: Ok, wait for a minute.

USER: Ok.

ASSISTANT: I have found the reservation. May I know your airport codes?

USER: I want to fly from ATL and destination airport is ORD.

ASSISTANT: Ok, can I know your planned trip dates?

USER: I want to take off on Jan 08 and book my return ticket also on Jan 10.

ASSISTANT: Ok, do you have any other requirements?

USER: I want to return in afternoon time.

ASSISTANT: May I know your class preference?

USER: I want to travel in economy class flight.

ASSISTANT: Please wait for a minute.

USER: Ok, I need 1 break in between my journey.

ASSISTANT: Sorry to say that, there are no flight's available based on your travelling dates.

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

ASSISTANT: Thank you for reaching us.