You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Amanda Roberts.

ASSISTANT: Amanda Roberts. How can I help you?

USER: Can you help me to change my recent reservation?

ASSISTANT: Sure Amanda Roberts, please give me a moment.

USER: Sure.

ASSISTANT: We have found a reservation by your name. Can you provide me new airport codes?

USER: ATL and OAK are my airport codes.

ASSISTANT: I would like to know the itinerary dates?

USER: Oct, 18 and Oct, 20 are my planned travel dates.

ASSISTANT: Do you have any class preferences?

USER: No.

ASSISTANT: Is there any time concern?

USER: My depart time should be at afternoon.

ASSISTANT: Do you have any connection limits?

USER: I need a direct flight.

ASSISTANT: Do you have any airline preferences?

USER: No.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Sorry to inform that there are no direct flights on your route.

USER: Ok, no problem. Please proceed.

ASSISTANT: Shall I check with connecting flights and in the economy class.

USER: Ok.

ASSISTANT: A moment please.

USER: Sure.

ASSISTANT: I have checked with connecting flights and in the economy class, but there are no flights available.

USER: It's ok, thank you for checking.

ASSISTANT: Thank you for approaching us.