You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

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

ASSISTANT: Sure, may I know your name?

USER: My name is Debra Wright.

ASSISTANT: Please wait.

USER: Ok.

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

USER:  My travelling dates are Apr 14 and Apr 16.

ASSISTANT: May I know your airport codes?

USER: My airport codes are DEN and LAS.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

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

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

ASSISTANT: Thanks for reaching us.