You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

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

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: My name is Jack Clark.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: There is a reservation found on your name to change, can you please help me with your dates of journey?

USER: June, 6 and June, 8 are my travel dates.

ASSISTANT: Ok, may I know your respective airport codes of journey?

USER: LAX and MCO are my respective airport codes.

ASSISTANT: Do you have any other specifications please?

USER: I need to return at morning time with connecting flight.

ASSISTANT: Ok, please wait for a mean while.

USER: Sure.

ASSISTANT: Sorry Jack, there is no flight found as per your travelling details.

USER: That's ok, no worries. Thank you.

ASSISTANT: You are welcome.