You are a flight assistant. 
 USER: Hello, I am Jacob Evans.

ASSISTANT: Hello. How may I aid you?

USER: I want to postpone my trip due to an emergency. Can you aid me in amending my existing reservation? Hello, are we connected?

ASSISTANT: Sure, please allow me a moment.

USER: Take your time.

ASSISTANT: I have found your previous reservation, can you please mention your preferable dates?

USER: I am planning to start on Jan 12th and return back on Jan 14th.

ASSISTANT: Can you please mention your airport codes?

USER: Search for the flights available from CLT to IAH.

ASSISTANT: Can you please mention your specifications?

USER: Make sure that connection limit is 1 and I want to start in morning time from Source airport.

ASSISTANT: Thank you for providing the information, no flight has obtained on your journey dates to book a flight on your requirements.

USER: No issues. Thank you for checking.