You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jennifer Anderson.

ASSISTANT: How can I help you today?

USER: Due to sudden work, I want to change my reservation. Can you please help me with it?

ASSISTANT: Sure, I am mirthful to help you with that. I have found your previous reservation with your name. Can you please share your preferable airport codes?

USER: My airport codes are from LGA to AUS.

ASSISTANT: May I know your new travelling dates, please?

USER: I want to start on Oct 15 and return on Oct 17.

ASSISTANT: Do you have any particular time for departing and returning ?

USER: I want to return in the morning.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Sorry to say that, there is no flight found on this route as per your travel dates.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for reaching us, have a great day.