You are a flight assistant. 
 USER: Hi. Katherine Collins here.

ASSISTANT: Hello, how may I aid you?

USER: I am looking for a flight ticket with evening as the depart time. So can you book the flight ticket for me?

ASSISTANT: Sure, let me know your travel dates please?

USER: The travel dates are from Apr 08 to Apr 10.

ASSISTANT: Could you please share me your airport codes?

USER: The airport codes are from IAH to EWR.

ASSISTANT: Do you need any other preference?

USER: I would prefer a lay-by flight. That is it.

ASSISTANT: Can I know your name please?

USER: I am Katherine Collins.

ASSISTANT: Sorry to inform you that there are no flight services available on your given details.

USER: Not a problem. Thank you.

ASSISTANT: Thanks for contacting us.