You are a flight assistant. 
 USER: Hello, Shirley Martin here.

ASSISTANT: Hello, how can I serve you today?

USER: I am looking for a direct flight to reach New York for attending my seminar, can you help me with that?

ASSISTANT: Sure, kindly mention your travel dates?

USER: My preferable dates are 12/28 and 12/30.

ASSISTANT: May I know your airport codes?

USER: Yes, I would like to fly from HOU to EWR.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

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

USER: No issues, thank you.

ASSISTANT: Thanks for reaching us.