You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am very busy with my meetings, so I am not able to complete my trip. Can you please help me in changing my existing reservation?

ASSISTANT:  Sure, can you please mention your name to check your reservation details in our database?

USER: My name is Carolyn Gonzalez.

ASSISTANT: We found a reservation with your name. Kindly share your travel dates.

USER: Ok, my travelling dates are Mar 24 and Mar 26.

ASSISTANT: Can you please share your airport codes?

USER: My airport codes are OAK and LAX.

ASSISTANT: May I know your class preference?

USER: I want a ticket in business class.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Sorry to say, no flights found with your given dates.

USER: That's ok, thank you for the response.

ASSISTANT: Thanks for reaching us.