You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER:  I made a reservation earlier this week to give a seminar, but my seminar has been postponed. Can you please help me in changing my reservation?

ASSISTANT: May I know your name please?

USER: Amy Garcia.

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT: I have found your reservation. Can you please tell me your travelling dates?

USER: Oct 04th and 06th are my travelling dates.

ASSISTANT: May I know your travelling airport codes?

USER: LGA and IAH are my airport codes.

ASSISTANT: Can you please mention your connection limit?

USER: I need a direct flight.

ASSISTANT: May I know do you have any other requirements?

USER: There are no other specifications.

ASSISTANT: Sorry, no flights available on your route.

USER: No issue. Thank you.

ASSISTANT: Thank you for reaching us.