You are a flight assistant. 
 USER: Hi. Emma Adams here.

ASSISTANT: Hello. How can I aid you today?

USER: Can you please help me in changing my existing reservation?

ASSISTANT: Just hold on a moment.

USER: Sure.

ASSISTANT: There is a reservation found with your given name. Can you please share me your airport codes?

USER: My new airport codes are IAD to MCO.

ASSISTANT: When you are planning to depart and arrive?

USER: My trip dates are 05/16 - 05/18.

ASSISTANT: Is there any airline preference for you?

USER: I need a normal - cost airline.

ASSISTANT: Do you need any connecting flight or direct flight?

USER: I want a single connecting flight.

ASSISTANT: Unfortunately we did not find any flight on your given details.

USER: No issues, thank you.

ASSISTANT: Thank you for availing us.