You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Due to an emergency, I want to change my reservation. Can you help me?

ASSISTANT: Ok, I will help you. Let me know your name to check the reservation status.

USER: David Wilson here.

ASSISTANT: Hold on a minute.

USER: Ok.

ASSISTANT: Thank you for waiting, we found a reservation on your name. Can you please share your journey dates?

USER: My trip dates are 01/14 and 01/16.

ASSISTANT: May I know your boarding and landing airport codes?

USER: My airport codes are LGA to BOS.

ASSISTANT: Do you have any other specifications?

USER: I need break in my journey and departure time should be morning.

ASSISTANT: Please, wait for a while.

USER: Thank you.

ASSISTANT: I am sorry to inform you that, there were no flights available that matches your requirements.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for approaching us.